// You have to set an additional flag in the exStyle, or just add it when you CreateWindowEx. SetWindowLong(hWnd, GWL_EXSTYLE, GetWindowLong(hWnd, GWL_EXSTYLE) | WS_EX_LAYERED);
// Use crKey as the transparency color. COLORREF crKey = RGB(0, 0, 0); //SetLayeredWindowAttributes(hWnd, crKey, 0, LWA_COLORKEY);
// Use bAlpha to determine the opacity of the layered window. // When alpha 0 the window is completely transparent, when it's 255 the window is opaque. SetLayeredWindowAttributes(hWnd, 0, 128, LWA_ALPHA); |