Don't link shlwapi directly.

For MSVC use #pragma comment to link shlwapi, and for MinGW use dynamic
loading of this library.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77635 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

build/bakefiles/common.bkl

@@ -589,7 +589,6 @@ $(TAB)$(VC_COMPILER) /EP /nologo "$(DOLLAR)(InputPath)" > "$(SETUPHDIR)\wx\msw\r
                 <!-- this one is only used if wxUSE_URL_NATIVE==1 but we don't
                      know if it is here so just add it unconditionally -->
                 <sys-lib>wininet</sys-lib>
-                <sys-lib>shlwapi</sys-lib>
             </if>
             <if cond="FORMAT=='borland'">
                 <sys-lib>oleacc</sys-lib>

build/bakefiles/wxpresets/presets/wx_win32.bkl

@@ -299,7 +299,6 @@
             <sys-lib>rpcrt4</sys-lib>
             <sys-lib>advapi32</sys-lib>
             <sys-lib>wsock32</sys-lib>
-            <sys-lib>shlwapi</sys-lib>
         </if>
 
         <!-- Libs common to both borland and MSVC               -->

include/wx/msw/taskbarbutton.h

@@ -20,7 +20,8 @@ namespace {
 class WXDLLIMPEXP_FWD_CORE ITaskbarList3;
 }
 
-class WXDLLIMPEXP_CORE wxTaskBarButtonImpl : public wxTaskBarButton {
+class WXDLLIMPEXP_CORE wxTaskBarButtonImpl : public wxTaskBarButton
+{
 public:
     virtual ~wxTaskBarButtonImpl();
 

src/msw/taskbarbutton.cpp

@@ -21,12 +21,20 @@
 
 #if wxUSE_TASKBARBUTTON
 
+#ifdef _MSC_VER
+    #pragma comment( lib, "shlwapi" )
+#endif
+
 #include "wx/msw/private.h"
 #include "wx/msw/taskbarbutton.h"
 
 #include <shlwapi.h>
 #include <initguid.h>
 
+#if wxUSE_DYNLIB_CLASS
+    #include "wx/dynlib.h"
+#endif // wxUSE_DYNLIB_CLASS
+
 // ----------------------------------------------------------------------------
 // Redefine the interfaces: ITaskbarList3, IObjectCollection,
 // ICustomDestinationList, IShellLink, IShellItem, IApplicationDocumentLists
@@ -332,9 +340,32 @@ inline HRESULT InitPropVariantFromBoolean(BOOL fVal, PROPVARIANT *ppropvar)
 
 inline HRESULT InitPropVariantFromString(PCWSTR psz, PROPVARIANT *ppropvar)
 {
+    HRESULT hr = E_FAIL;
     ppropvar->vt = VT_LPWSTR;
-    HRESULT hr = SHStrDupW(psz, &ppropvar->pwszVal);
-    if (FAILED(hr))
+
+#if wxUSE_DYNLIB_CLASS
+    typedef HRESULT (WINAPI *SHStrDupW_t)(LPCTSTR, LPTSTR*);
+    static SHStrDupW_t s_pfnSHStrDupW = NULL;
+    if ( !s_pfnSHStrDupW )
+    {
+        wxDynamicLibrary dll(wxT("shlwapi.dll"));
+        if ( dll.IsLoaded() )
+        {
+            s_pfnSHStrDupW = (SHStrDupW_t)dll.GetSymbol(wxT("SHStrDupW"));
+        }
+    }
+
+    if ( s_pfnSHStrDupW )
+    {
+        hr = s_pfnSHStrDupW(psz, &ppropvar->pwszVal);
+    }
+#elif defined (_MSC_VER)
+    hr = SHStrDupW(psz, &ppropvar->pwszVal);
+#else
+    wxUnusedVar(psz);
+#endif
+
+    if ( FAILED(hr) )
     {
         PropVariantInit(ppropvar);
     }