橢圓形的窗體

//  新視窗類 with wc do begin     style := CS_VREDRAW or CS_HREDRAW;     lpfnWndProc := @GdiProc1;     cbClsExtra := 0;     cbWndExtra := 0;     hCursor := LoadCursor(0, IDC_ARROW);//  ;     hbrBackground

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