[WinAPI] API 1 [桌面上画一个简单彩色图形]

 #include<Windows.h>
 void GdiOut(HDC hdc);
 int WINAPI WinMain(HINSTANCE hInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpCmdLine,
                    int nCmdShow)
 {
     HDC hdc=GetDC(NULL);
     GdiOut(hdc);
     ReleaseDC(NULL,hdc);
 }
 void GdiOut(HDC hdc)
 {
     HPEN hpen;
     HBRUSH hbrush;
     BYTE bRed=;
     BYTE bGreen=;
     BYTE bBlue=;
     COLORREF cPen=RGB(bRed,bGreen,bBlue);
     COLORREF cBrush=RGB(,GetGValue(cPen),);
     hpen=CreatePen(PS_SOLID,,cPen);
     hbrush=CreateSolidBrush(cBrush);
     SelectObject(hdc,hbrush);
     LineTo(hdc,,);
     SelectObject(hdc,hpen);
     Rectangle(hdc,,,,);
     DeleteObject(hpen);
     DeleteObject(hbrush);
 }