Verwenden von Stiften

Dieser Abschnitt enthält Beispielcode, der die Darstellung von Linien veranschaulicht, die mit verschiedenen Stiftformatvorlagen und Attributen gezeichnet werden.

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, 
                             LPARAM lParam) 
{ 
    PAINTSTRUCT ps; 
    LOGBRUSH lb; 
    RECT rc; 
    HDC hdc; 
    int i; 
    HGDIOBJ hPen = NULL;
    HGDIOBJ hPenOld; 
    DWORD dwPenStyle[] = { 
                           PS_DASH, 
                           PS_DASHDOT, 
                           PS_DOT, 
                           PS_INSIDEFRAME, 
                           PS_NULL, 
                           PS_SOLID 
                        }; 
    UINT uHatch[] = { 
                      HS_BDIAGONAL, 
                      HS_CROSS, 
                      HS_DIAGCROSS, 
                      HS_FDIAGONAL, 
                      HS_HORIZONTAL, 
                      HS_VERTICAL     
                     }; 
 
    switch (uMsg) 
    { 
        case WM_PAINT: 
        { 
            GetClientRect(hWnd, &rc); 
            rc.left += 10; 
            rc.top += 10; 
            rc.bottom -= 10; 
 
            // Initialize the pen's brush.
            lb.lbStyle = BS_SOLID; 
            lb.lbColor = RGB(255,0,0); 
            lb.lbHatch = 0; 
 
            hdc = BeginPaint(hWnd, &ps); 
            for (i = 0; i < 6; i++) 
            { 
                hPen = ExtCreatePen(PS_COSMETIC | dwPenStyle[i], 
                                    1, &lb, 0, NULL); 
                hPenOld = SelectObject(hdc, hPen); 
                MoveToEx(hdc, rc.left + (i * 20), rc.top, NULL); 
                LineTo(hdc, rc.left + (i * 20), rc.bottom); 
                SelectObject(hdc, hPenOld); 
                DeleteObject(hPen); 
            } 
            rc.left += 150; 
            for (i = 0; i < 6; i++) 
            { 
                lb.lbStyle = BS_HATCHED; 
                lb.lbColor = RGB(0,0,255);     
                lb.lbHatch = uHatch[i]; 
                hPen = ExtCreatePen(PS_GEOMETRIC, 
                                    5, &lb, 0, NULL); 
                hPenOld = SelectObject(hdc, hPen); 
                MoveToEx(hdc, rc.left + (i * 20), rc.top, NULL); 
                LineTo(hdc, rc.left + (i * 20), rc.bottom); 
                SelectObject(hdc, hPenOld); 
                DeleteObject(hPen); 
            } 
            EndPaint(hWnd, &ps); 
 
        } 
        break; 
 
        case WM_DESTROY: 
            DeleteObject(hPen); 
            PostQuitMessage(0); 
            break; 
 
        default: 
            return DefWindowProc(hWnd, uMsg, wParam, lParam); 
    } 
 
    return FALSE; 
}