How more simple can I say that I am trying to create a dialog for "OSD"
(OnScreen Display) ? Please read the "Meaning..." again.
I am looking forward to hear your ideas, but until then I have already found
where the problem was:
The rereturn value of the CreatedWindow::find(window)
is zero(0) if we do not call the show() previously.
I anyone is interested on how to create a transparent background with win32 API:
typedef BOOL(WINAPI *SLWA)(HWND, COLORREF, BYTE, DWORD);
main()
{
window->color(BLACK);//the color to be transparent later
window->show();
HWND winHwnd = your win hwnd;//use CreatedWindow
SLWA pSetLayeredWindowAttributes = NULL;
HINSTANCE pLib = LoadLibrary("USER32.DLL");
pSetLayeredWindowAttributes
=(SLWA)GetProcAddress(pLib,"SetLayeredWindowAttributes");
SetWindowLong(winHwnd, GWL_EXSTYLE,GetWindowLong(winHwnd,GWL_EXSTYLE)
^ WS_EX_LAYERED);
//RGB() color of your background
pSetLayeredWindowAttributes(winHwnd, RGB(0,0,0),
0, LWA_COLORKEY);
RedrawWindow(winHwnd, NULL, NULL,RDW_ERASE | RDW_INVALIDATE | RDW_FRAME |
RDW_ALLCHILDREN);
}
If anyone has achieved the same functionality with pure FTLK API please share
it with me.
Regards.
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