+
+ switch (method)
+ {
+ case 1:
+ // This one only partially works. Appears to be an undocumented
+ // convention that not all widgets adhear to. For example, for
+ // some widgets backgrounds or non-client areas may not be
+ // painted.
+ ::SendMessage(GetHwndOf(window), WM_PAINT, (long)GetHdcOf(dc), 0);
+ break;
+
+ case 2:
+ // This one works much better, except for on XP. On Win2k all
+ // widgets and their children are captured correctly[**]. On XP
+ // with Themes activated most native widgets draw only partially,
+ // if at all. Without themes it works just like on Win2k.
+ //
+ // ** The radio buttons in a wxRadioBox are not its children by
+ // default, but you can capture the panel instead...
+ ::SendMessage(GetHwndOf(window), WM_PRINT, (long)GetHdcOf(dc),
+ PRF_CLIENT | PRF_NONCLIENT | PRF_CHILDREN |
+ PRF_ERASEBKGND | PRF_OWNED );
+ break;
+
+ case 3:
+ // This one is only defined in the latest SDK and only available
+ // on XP. MSDN says it is similar to sending WM_PRINT so I expect
+ // that it will work similar to the above. Since it is avaialble
+ // only on XP, it can't be compiled like this and will have to be
+ // loaded dynamically.
+ //::PrintWindow(GetHwndOf(window), GetHdcOf(dc), 0);
+ //break;
+
+ // fall through
+
+ case 4:
+ // Use PrintWindow if available, or fallback to WM_PRINT
+ // otherwise. Unfortunately using PrintWindow is even worse than
+ // WM_PRINT. For most native widgets nothing is drawn to the dc
+ // at all, with or without Themes.
+ typedef BOOL (WINAPI *PrintWindow_t)(HWND, HDC, UINT);
+ static bool s_triedToLoad = false;
+ static PrintWindow_t pfnPrintWindow = NULL;
+ if ( !s_triedToLoad )
+ {
+
+ s_triedToLoad = true;
+ wxDynamicLibrary dllUser32(_T("user32.dll"));
+ if ( dllUser32.IsLoaded() )
+ {
+ wxLogNull nolog; // Don't report errors here
+ pfnPrintWindow = (PrintWindow_t)dllUser32.GetSymbol(_T("PrintWindow"));
+ }
+ }
+ if (pfnPrintWindow)
+ {
+ printf("Using PrintWindow\n");
+ pfnPrintWindow(GetHwndOf(window), GetHdcOf(dc), 0);
+ }
+ else
+ {
+ printf("Using WM_PRINT\n");
+ ::SendMessage(GetHwndOf(window), WM_PRINT, (long)GetHdcOf(dc),
+ PRF_CLIENT | PRF_NONCLIENT | PRF_CHILDREN | PRF_ERASEBKGND | PRF_OWNED );
+ }
+ }