WM_CTLCOLORSTATIC on Vista Aero

I created a transparent dialogbox. To make the static text control in the dialgbox to be transparent, I processed the WM_CTLCOLORSTATIC with the code like this:

case WM_CTLCOLORSTATIC:
{
HDC hdc=(HDC)wParam;

SetBkMode(hdc, TRANSPARENT);
}
return (INT_PTR)GetStockObject(NULL_BRUSH);

This worked very well on Win98, Win2000, WinXP and even on Windows Vista without Aero.

But, if the Aero is turned on, strange thing happens.

The static control turns into a black block. It seems that NULL_BRUSH does not work in its usual way.

Does anybody know how to fix this? I do not want to turn off the Aero by force in my program.

Thanks a lot in advance.

Henry Fish

.

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