C++ API 画图改变 线条的属性 颜色 宽度

[ts_feng]

C++ API 非MFC 在windows窗下画线
想改变线条的属性 颜色 宽度 等 用 CreatePen 怎么没效果？谢谢

那用什么函数呢?试了好几个都无效

case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);

// SetPixel(hdc,0, cyClient / 2,255);
//SetPenColor(hdc,255);

if(CreatePen(PS_DASH ,5,255)==NULL) MessageBox (NULL, TEXT ("CreatePen failure!"), TEXT ("111"), 0);

MoveToEx (hdc, 0, cyClient / 2, NULL) ;

LineTo (hdc, cxClient, cyClient / 2) ;



EndPaint(hWnd, &ps);
break;

[Eleven]

case WM_PAINT:
			{
				hdc = BeginPaint(hWnd, &ps);
				
				HPEN hPen = CreatePen(PS_DASH, 5, RGB(255, 0, 128));
				HPEN hOldPen = (HPEN)SelectObject(hdc, hPen);
				
				MoveToEx (hdc, 0, 0, NULL) ;
				
				LineTo (hdc, 100, 100) ;

				SelectObject(hdc, hOldPen);
				
				EndPaint(hWnd, &ps);
			}
			break;