Making irregular windows

[Frank]

I do the following and get a sharp pointed square window.

I wanted rounded corners.

Can you tell me what is wrong?

thanks

hwndIDYourself = CreateWindow ("button", "Identify\nYourself",

WS_CHILD | WS_VISIBLE | BS_CENTER | BS_MULTILINE,

0, 0, 1, 1,

hwndArg, (HMENU) IDC_W_ID_YOURSELF, hInstance, NULL);

....snip...

MoveWindow (hwndIDYourself,200,200,200,200,TRUE);

HRGN hRegion = CreateRoundRectRgn (0,0,200,200,200,200);

SetWindowRgn(hwndIDYourself, hRegion, TRUE);

UpdateWindow(hwndIDYourself);