[Bug 50495] the WS_EX_LAYERED set SetWindowLong GWL_EXSTYLE , Window show white rather than transparency.

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50495

--- Comment #2 from Bruni  ---
...
You have to comment out the lines
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RECT rect;
    GetWindowRect(hWnd, &rect);
    SetWindowPos(hWnd, HWND_TOPMOST, rect.left, rect.top, rect.right -
rect.left, rect.bottom - rect.top, SWP_DRAWFRAME);
    LONG ret = GetWindowLong(hWnd, GWL_EXSTYLE);
        ret = ret | WS_EX_LAYERED;
        SetWindowLong(hWnd, GWL_EXSTYLE, ret);
    ShowWindow(hWnd, SW_SHOWMAXIMIZED);
    UpdateWindow(hWnd); 
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as well.