问Win32 - GDI -更改自定义笔颜色

EN

HPEN dashPen = CreatePen(PS_DASH, 1, RGB(255, 255, 0));
HPEN dashDotPen = CreatePen(PS_DASHDOT, 1, RGB(255, 255, 0));

    // changing color works with DC_PEN but want something similar for custom pen
    SelectObject(hdc, GetStockObject(DC_PEN));
    SetDCPenColor(hdc, RGB(250, 0, 0));
    MoveToEx(hdc, 100, 100, NULL);
    LineTo(hdc, 200, 200); 


    // Changing of Pen color doesn't seem to work for the custom pen
    SelectObject(hdc, dashPen);
    SetDCPenColor(hdc, COLOR_BLUE);
    MoveToEx(hdc, 150, 150, NULL);
    LineTo(hdc, 250, 250); 

    SelectObject(hdc, dashDotPen);
    SetDCPenColor(hdc, COLOR_GRAY);
    MoveToEx(hdc, 175, 175, NULL);
    LineTo(hdc, 275, 275);

    DeleteObject(dashPen);
    DeleteObject(dashDotPen);