如何给窗口设置背景图片
时间: 2023-12-04 13:05:32 浏览: 34
在Windows窗口中,可以使用以下代码设置背景图片:
1. 首先需要包含Windows.h头文件:
```c++
#include <Windows.h>
```
2. 在窗口过程中处理WM_ERASEBKGND消息,将其返回值设为非零:
```c++
case WM_ERASEBKGND:
return 1;
```
3. 在窗口创建时,使用LoadImage函数加载图片并将其设为窗口的背景:
```c++
HBITMAP hBitmap = (HBITMAP)LoadImage(NULL, "path/to/image.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
HBRUSH hBrush = CreatePatternBrush(hBitmap);
SendMessage(hWnd, WM_SETFONT, (WPARAM)hFont, TRUE);
SendMessage(hWnd, WM_SETTEXT, 0, (LPARAM)"Hello World!");
SendMessage(hWnd, WM_SETICON, ICON_SMALL, (LPARAM)hIconSmall);
SendMessage(hWnd, WM_SETICON, ICON_BIG, (LPARAM)hIconBig);
SendMessage(hWnd, WM_SETICON, ICON_SMALL2, (LPARAM)hIconSmall2);
SendMessage(hWnd, WM_SETBACKGROUND, 0, (LPARAM)hBrush);
```
其中,hBitmap为加载的图片句柄,hBrush为用于填充背景的画刷句柄,hFont、hIconSmall、hIconBig、hIconSmall2为窗口的字体和图标句柄。
注意:在窗口销毁时需要释放创建的画刷句柄和图片句柄:
```c++
case WM_DESTROY:
DeleteObject(hBrush);
DeleteObject(hBitmap);
PostQuitMessage(0);
break;
```