Added wxWindowMSW::MSWGetThemeColour(); initially use it in wxComboCtrl::OnThemeChange()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62947 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/window.h

@@ -13,6 +13,8 @@
 #ifndef _WX_WINDOW_H_
 #define _WX_WINDOW_H_
 
+enum wxSystemColour;
+
 // if this is set to 1, we use deferred window sizing to reduce flicker when
 // resizing complicated window hierarchies, but this can in theory result in
 // different behaviour than the old code so we keep the possibility to use it
@@ -413,6 +415,21 @@ public:
     WXHBRUSH MSWGetBgBrush(WXHDC hDC) { return MSWGetBgBrush(hDC, this); }
     WXHBRUSH MSWGetBgBrush(WXHDC hDC, wxWindowMSW *child);
 
+    enum MSWThemeColour
+    {
+        ThemeColourText = 0,
+        ThemeColourBackground,
+        ThemeColourBorder
+    };
+
+    // returns a specific theme colour, or if that is not possible then
+    // wxSystemSettings::GetColour(fallback)
+    wxColour MSWGetThemeColour(const wchar_t *themeName,
+                               int themePart,
+                               int themeState,
+                               MSWThemeColour themeColour,
+                               wxSystemColour fallback);
+
     // gives the parent the possibility to draw its children background, e.g.
     // this is used by wxNotebook to do it using DrawThemeBackground()
     //