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GetDlgItem 函数
返回对话框或窗口中指定控件的句柄。
注意：RegisterClass函数已经升级成 RegisterClassEx ，如果不需要设置窗口类小图标，仍然可以用RegisterClass。
函数原型：
HWND WINAPI GetDlgItem (
HWND hDlg,int nIDDlgItem );
参数
hDlg
类型：HWND
包含控件的对话框或窗口句柄。
nIDDlgItem
类型：int
将要被返回控件的标识符。
返回值
类型：HWND
如果成功，返回标识控件的窗口句柄。
如果失败，返回NULL。
如果失败，返回NULL。
备注
GetDlgItemText会向控件发送 WM_GETTEXT 消息。
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 |
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