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SetWindowText 函数
如果窗口有标题栏，改变其标题栏文本。如果窗口是控件，改变控件文本。SetWindowText 不能改变其它应用程序控件的文本。
GetWindowText 函数可以获取窗口或控件的文本。
函数原型：
int WINAPI SetWindowText (
HWND hWnd,LPTSTR lpString );
参数
hWnd
类型：HWND
将要改变标题或文本窗口或控件的窗口句柄。
lpString
类型：LPTSTR
窗口新标题或控件新文本。
返回值
类型：int
如果成功，返回非0。
如果失败，返回0。
如果失败，返回0。
备注
如果目标窗口被本进程拥有，SetWindowText 会向窗口发送 WM_SETTEXT 消息去设置文本。如果列表框控件用 WS_CAPTION 风格创建，SetWindowText 设置标题，而不是列表框控件的条目值。
支持
| 最低桌面系统支持 | Windows 2000 Professional |
| 头文件 | Winuser.h (已包含在Windows.h中) |
| 库 | User32.lib |
| DLL | User32.dll |
| UNICODE版本名 | SetWindowTextW |
| ANSI版本名 | SetWindowTextA |
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