diff --git a/samples/aui/auidemo.cpp b/samples/aui/auidemo.cpp
index 666e8dbc2e..2593018dcd 100644
--- a/samples/aui/auidemo.cpp
+++ b/samples/aui/auidemo.cpp
@@ -1401,7 +1401,7 @@ void MyFrame::OnNotebookPageChanging(wxAuiNotebookEvent& evt)
 void MyFrame::OnAllowNotebookDnD(wxAuiNotebookEvent& evt)
 {
     // for the purpose of this test application, explicitly
-    // allow all noteboko drag and drop events
+    // allow all notebook drag and drop events
     evt.Allow();
 }
 
diff --git a/samples/combo/combo.cpp b/samples/combo/combo.cpp
index c9d9584001..9c4d86c450 100644
--- a/samples/combo/combo.cpp
+++ b/samples/combo/combo.cpp
@@ -331,7 +331,7 @@ public:
     }
 
     //
-    // Utilies for item manipulation
+    // Utilities for item manipulation
     //
 
     void AddSelection( const wxString& selstr )
diff --git a/samples/dataview/mymodels.cpp b/samples/dataview/mymodels.cpp
index 418de7d886..609c749fa0 100644
--- a/samples/dataview/mymodels.cpp
+++ b/samples/dataview/mymodels.cpp
@@ -427,7 +427,7 @@ void MyListModel::DeleteItems( const wxDataViewItemArray &items )
 
     // Sort in descending order so that the last
     // row will be deleted first. Otherwise the
-    // remaining indeces would all be wrong.
+    // remaining indices would all be wrong.
     rows.Sort( my_sort_reverse );
     for (i = 0; i < rows.GetCount(); i++)
     {
diff --git a/samples/grid/griddemo.cpp b/samples/grid/griddemo.cpp
index aa78218393..8c41f27e4b 100644
--- a/samples/grid/griddemo.cpp
+++ b/samples/grid/griddemo.cpp
@@ -2037,7 +2037,7 @@ wxString BugsGridTable::GetTypeName(int WXUNUSED(row), int col)
             return wxGRID_VALUE_NUMBER;
 
         case Col_Severity:
-            // fall thorugh (TODO should be a list)
+            // fall through (TODO should be a list)
 
         case Col_Summary:
             return wxString::Format("%s:80", wxGRID_VALUE_STRING);
diff --git a/samples/layout/layout.cpp b/samples/layout/layout.cpp
index df87c63cb8..7f62233250 100644
--- a/samples/layout/layout.cpp
+++ b/samples/layout/layout.cpp
@@ -321,7 +321,7 @@ MyFlexSizerFrame::MyFlexSizerFrame(wxFrame* parent)
     wxFlexGridSizer *sizerFlex;
     wxPanel* p = new wxPanel(this, wxID_ANY);
 
-    // consttuct the first column
+    // construct the first column
     wxSizer *sizerCol1 = new wxBoxSizer(wxVERTICAL);
     sizerCol1->Add(new wxStaticText(p, wxID_ANY, "Ungrowable:"), 0, wxCENTER | wxTOP, 20);
     sizerFlex = new wxFlexGridSizer(3, 3, wxSize(5, 5));
@@ -401,7 +401,7 @@ MyNotebookWithSizerDialog::MyNotebookWithSizerDialog(wxWindow *parent, const wxS
                         wxDefaultPosition, wxDefaultSize,
                         wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
 {
-    // Begin with first hierarchy: a notebook at the top and
+    // Begin with first hierarchy: a notebook at the top
     // and OK button at the bottom.
 
     wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
diff --git a/samples/mediaplayer/mediaplayer.cpp b/samples/mediaplayer/mediaplayer.cpp
index e9e779b0b9..691537b6e9 100644
--- a/samples/mediaplayer/mediaplayer.cpp
+++ b/samples/mediaplayer/mediaplayer.cpp
@@ -15,7 +15,7 @@
 // of the wxMediaCtrl class in wxWidgets.
 //
 // To use this sample, simply select Open File from the file menu,
-// select the file you want to play - and MediaPlayer will play the file in a
+// select the file you want to play - and MediaPlayer will play the file in
 // the current notebook page, showing video if necessary.
 //
 // You can select one of the menu options, or move the slider around
@@ -906,7 +906,7 @@ void wxMediaPlayerFrame::DoOpenFile(const wxString& path, bool bNewPage)
 // ----------------------------------------------------------------------------
 // wxMediaPlayerFrame::DoPlayFile
 //
-// Pauses the file if its the currently playing file,
+// Pauses the file if it's the currently playing file,
 // otherwise it plays the file
 // ----------------------------------------------------------------------------
 void wxMediaPlayerFrame::DoPlayFile(const wxString& path)
@@ -1499,7 +1499,7 @@ wxMediaPlayerNotebookPage::wxMediaPlayerNotebookPage(wxMediaPlayerFrame* parentF
                                    szBackend);
 // you could change the cursor here like
 //    m_mediactrl->SetCursor(wxCURSOR_BLANK);
-// note that this may not effect it if SetPlayerControls
+// note that this may not affect it if SetPlayerControls
 // is set to something else than wxMEDIACTRLPLAYERCONTROLS_NONE
     wxASSERT_MSG(bOK, "Could not create media control!");
     wxUnusedVar(bOK);
diff --git a/samples/oleauto/oleauto.cpp b/samples/oleauto/oleauto.cpp
index b411b64717..94bae6eecd 100644
--- a/samples/oleauto/oleauto.cpp
+++ b/samples/oleauto/oleauto.cpp
@@ -33,7 +33,7 @@
 #endif
 
 // ----------------------------------------------------------------------------
-// ressources
+// resources
 // ----------------------------------------------------------------------------
 // the application icon
 #ifndef wxHAS_IMAGES_IN_RESOURCES
diff --git a/samples/opengl/isosurf/isosurf.cpp b/samples/opengl/isosurf/isosurf.cpp
index d924d5161f..1150553abf 100644
--- a/samples/opengl/isosurf/isosurf.cpp
+++ b/samples/opengl/isosurf/isosurf.cpp
@@ -197,7 +197,7 @@ void TestGLCanvas::LoadSurface(const wxString& filename)
     }
 
     {
-        // we suppose to have in input a text file containing floating numbers
+        // we are supposed to have as input a text file containing floating numbers
         // space/newline-separated... first 3 numbers are the coordinates of a
         // vertex and the following 3 are the relative vertex normal and so on...
 
diff --git a/samples/opengl/pyramid/mathstuff.h b/samples/opengl/pyramid/mathstuff.h
index 0841bb1899..d8278ac375 100644
--- a/samples/opengl/pyramid/mathstuff.h
+++ b/samples/opengl/pyramid/mathstuff.h
@@ -11,7 +11,7 @@
   #define MATHSTUFF_H
 
 //NOTE:
-// glm library is great for handling matrices and vectors in a OpenGL style, see
+// glm library is great for handling matrices and vectors in an OpenGL style, see
 // http://glm.g-truc.net/
 // But it's too large for this simple sample. I coded on my own the maths needed.
 
diff --git a/samples/opengl/pyramid/oglstuff.cpp b/samples/opengl/pyramid/oglstuff.cpp
index 9fc74ddcaa..367f681ff1 100644
--- a/samples/opengl/pyramid/oglstuff.cpp
+++ b/samples/opengl/pyramid/oglstuff.cpp
@@ -42,7 +42,7 @@ bool MyOnGLError(int err, const GLchar* glMsg = NULL)
 
 // We do calculations with 'doubles'. We pass 'GLFloats' to the shaders
 // because OGL added 'doubles' since OGL 4.0, and this sample is for 3.2
-// Due to asynchronous nature of OGL, we can't not trust in the passed matrix
+// Due to asynchronous nature of OGL, we can't trust in the passed matrix
 // to be stored by GPU before the passing-function returns. So we don't use
 // temporary storage, but dedicated matrices
 void SetAsGLFloat4x4(double *matD, GLfloat *matF, int msize)
@@ -352,7 +352,7 @@ bool myOGLShaders::AskUnifLocations()
         GLint glret = glGetUniformLocation(m_proId, it->name.c_str());
         if ( glret == -1 )
         {
-            // Return now, this GPU program can not be used because we will
+            // Return now, this GPU program cannot be used because we will
             // pass data to unknown/unused uniform locations
             return false;
         }
diff --git a/samples/opengl/pyramid/oglstuff.h b/samples/opengl/pyramid/oglstuff.h
index 7163c6c750..65b4c7f657 100644
--- a/samples/opengl/pyramid/oglstuff.h
+++ b/samples/opengl/pyramid/oglstuff.h
@@ -50,7 +50,7 @@
 
   I decided to keep apart all of this from wxWidgets. You won't find anything
   related to wxWidgets in the oglstuff[.h][.cpp] files.
-  That's why I use std::vector and std:string instead of those provided by wx.
+  That's why I use std::vector and std::string instead of those provided by wx.
 */
 
 
diff --git a/samples/opengl/pyramid/pyramid.cpp b/samples/opengl/pyramid/pyramid.cpp
index 2f7245558c..b8f988f5f2 100644
--- a/samples/opengl/pyramid/pyramid.cpp
+++ b/samples/opengl/pyramid/pyramid.cpp
@@ -273,7 +273,7 @@ void fOGLErrHandler(int err, int glerr, const GLchar* glMsg)
 
 // Creates a 4-bytes-per-pixel, RGBA array from a wxImage.
 // If the image has alpha channel, it's used. If not, pixels with 'cTrans' color
-// get 'cAlpha' alpha; an the rest of pixels get alpha=255 (opaque).
+// get 'cAlpha' alpha; and the rest of pixels get alpha=255 (opaque).
 //
 // NOTE: The returned pointer must be deleted somewhere in the app.
 unsigned char* MyImgToArray(const wxImage& img, const wxColour& cTrans, unsigned char cAlpha)
diff --git a/samples/propgrid/propgrid.cpp b/samples/propgrid/propgrid.cpp
index 587bf19e11..6d6b5dedf7 100644
--- a/samples/propgrid/propgrid.cpp
+++ b/samples/propgrid/propgrid.cpp
@@ -2773,7 +2773,7 @@ void FormMain::OnColourScheme( wxCommandEvent& event )
 void FormMain::OnCatColoursUpdateUI(wxUpdateUIEvent& WXUNUSED(event))
 {
     // Prevent menu item from being checked
-    // if it is selected from imroper page.
+    // if it is selected from improper page.
     const wxPropertyGrid* pg = m_pPropGridManager->GetGrid();
     m_itemCatColours->SetCheckable(
          pg->GetPropertyByName("Appearance") &&
diff --git a/samples/scroll/scroll.cpp b/samples/scroll/scroll.cpp
index 38986172b5..8639a920ea 100644
--- a/samples/scroll/scroll.cpp
+++ b/samples/scroll/scroll.cpp
@@ -325,7 +325,7 @@ private:
         GetClientSize( &size_x, &size_y );
 
         // First cell: (0,0)(100,25)
-        // It it on screen?
+        // Is it on screen?
         if ((0+100-scroll_x > 0) && (0+25-scroll_y > 0) &&
             (0-scroll_x < size_x) && (0-scroll_y < size_y))
         {
@@ -339,7 +339,7 @@ private:
 
 
         // Second cell: (200,0)(100,25)
-        // It it on screen?
+        // Is it on screen?
         if ((200+100-scroll_x > 0) && (0+25-scroll_y > 0) &&
             (200-scroll_x < size_x) && (0-scroll_y < size_y))
         {
diff --git a/samples/thread/thread.cpp b/samples/thread/thread.cpp
index 3921d968f6..6c26d0f8d5 100644
--- a/samples/thread/thread.cpp
+++ b/samples/thread/thread.cpp
@@ -260,7 +260,7 @@ private:
 };
 
 // ----------------------------------------------------------------------------
-// an helper dialog used by MyFrame::OnStartGUIThread
+// a helper dialog used by MyFrame::OnStartGUIThread
 // ----------------------------------------------------------------------------
 
 class MyImageDialog: public wxDialog
diff --git a/samples/treectrl/treetest.cpp b/samples/treectrl/treetest.cpp
index fe39c7d332..ff584dbaf6 100644
--- a/samples/treectrl/treetest.cpp
+++ b/samples/treectrl/treetest.cpp
@@ -213,7 +213,7 @@ MyFrame::MyFrame(const wxString& title, int x, int y, int w, int h)
 {
     // This reduces flicker effects - even better would be to define
     // OnEraseBackground to do nothing. When the tree control's scrollbars are
-    // show or hidden, the frame is sent a background erase event.
+    // shown or hidden, the frame is sent a background erase event.
     SetBackgroundColour(*wxWHITE);
 
     // Give it an icon
@@ -1039,7 +1039,7 @@ void MyTreeCtrl::CreateStateImageList(bool del)
         int width  = icons[0].GetWidth(),
             height = icons[0].GetHeight();
 
-        // Make an state image list containing small icons
+        // Make a state image list containing small icons
         states = new wxImageList(width, height, true);
 
         for ( size_t i = 0; i < WXSIZEOF(icons); i++ )
diff --git a/samples/widgets/headerctrl.cpp b/samples/widgets/headerctrl.cpp
index 35d6ce71eb..6877f7cff4 100644
--- a/samples/widgets/headerctrl.cpp
+++ b/samples/widgets/headerctrl.cpp
@@ -78,9 +78,9 @@ protected:
     long GetHeaderStyleFlags() const;
     // reset column style
     void ResetColumnStyle(int col);
-    // compose columnm style flags based on selections
+    // compose column style flags based on selections
     int GetColumnStyleFlags(int col) const;
-    // get columnm alignment flags based on selection
+    // get column alignment flags based on selection
     wxAlignment GetColumnAlignmentFlag(int col) const;
 
     // the control itself and the sizer it is in
diff --git a/samples/widgets/widgets.h b/samples/widgets/widgets.h
index 0cc834d9d8..b93b409e3f 100644
--- a/samples/widgets/widgets.h
+++ b/samples/widgets/widgets.h
@@ -149,7 +149,7 @@ public:
     // this is currently used only to take into account the border flags
     virtual void RecreateWidget() = 0;
 
-    // apply current atrributes to the widget(s)
+    // apply current attributes to the widget(s)
     void SetUpWidget();
 
     // the default attributes for the widget
diff --git a/samples/xrc/custclas.cpp b/samples/xrc/custclas.cpp
index 18a2ff772b..cb1948ae3d 100644
--- a/samples/xrc/custclas.cpp
+++ b/samples/xrc/custclas.cpp
@@ -82,7 +82,7 @@ MyResizableListCtrl::MyResizableListCtrl( wxWindow *parent, wxWindowID id,
     // This listctrl needs to insert its columns in the constructor, since
     // as soon as the listctrl is built, it is resized and grafted onto an
     // "unknown" XRC placeholder. This induces an OnSize() event, calling the
-    // overrriden OnSize function for this class, which needs to have 3
+    // overridden OnSize function for this class, which needs to have 3
     // columns to resize (else an assert on WXGTK debug build).
     InsertColumn( RECORD_COLUMN, _("Record"), wxLIST_FORMAT_LEFT, 140);
     InsertColumn( ACTION_COLUMN, _("Action"), wxLIST_FORMAT_LEFT, 70);
diff --git a/samples/xrc/derivdlg.cpp b/samples/xrc/derivdlg.cpp
index 1318571590..48a7676c67 100644
--- a/samples/xrc/derivdlg.cpp
+++ b/samples/xrc/derivdlg.cpp
@@ -30,7 +30,7 @@
 // Remaining headers: Needed wx headers, then wx/contrib headers, then application headers
 //-----------------------------------------------------------------------------
 
-#include "wx/xrc/xmlres.h"              // XRC XML resouces
+#include "wx/xrc/xmlres.h"              // XRC XML resources
 
 //-----------------------------------------------------------------------------
 // Event table: connect the events to the handler functions to process them
diff --git a/samples/xrc/myframe.cpp b/samples/xrc/myframe.cpp
index d55fa2a807..e897500454 100644
--- a/samples/xrc/myframe.cpp
+++ b/samples/xrc/myframe.cpp
@@ -37,7 +37,7 @@
 
 //-----------------------------------------------------------------------------
 
-#include "wx/xrc/xmlres.h"              // XRC XML resouces
+#include "wx/xrc/xmlres.h"              // XRC XML resources
 
 //-----------------------------------------------------------------------------
 
diff --git a/samples/xrc/xrcdemo.cpp b/samples/xrc/xrcdemo.cpp
index 1a70cbe93f..4e82fb17be 100644
--- a/samples/xrc/xrcdemo.cpp
+++ b/samples/xrc/xrcdemo.cpp
@@ -102,7 +102,7 @@ bool MyApp::OnInit()
 
     // Load all of the XRC files that will be used. You can put everything
     // into one giant XRC file if you wanted, but then they become more
-    // diffcult to manage, and harder to reuse in later projects.
+    // difficult to manage, and harder to reuse in later projects.
     if ( !wxXmlResource::Get()->LoadAllFiles("rc") )
         return false;
 
diff --git a/samples/xti/codereadercallback.cpp b/samples/xti/codereadercallback.cpp
index 954aeb2ed0..d1ad96a2ff 100644
--- a/samples/xti/codereadercallback.cpp
+++ b/samples/xti/codereadercallback.cpp
@@ -49,7 +49,7 @@ struct wxObjectCodeReaderCallback::wxObjectCodeReaderCallbackInternal
     {
         if ( m_objectNames.find(objectID) != m_objectNames.end() )
         {
-            wxLogError( _("Passing a already registered object to SetObjectName") );
+            wxLogError( _("Passing an already registered object to SetObjectName") );
             return ;
         }
         m_objectNames[objectID] = (const wxChar *)name;