mfc getdlgitemint_getdlgitem函数_getdlgitem

lgltem：指定将被检索的控件标识符。

返回值：如果函数调用成功则返回值为给定控件的窗口句柄。如果函数调用失败，则返回值为NULL，表示为一个无效的对话框句柄或一个不存在的控件。若想获得更多错误信息，请调用GetLastError函数。

备注：可以通过使用任何父子窗口对来使用GetDlgltem函数，而不仅只是对话框。只要hDlg参数指定一个父窗口，且子窗口有一个独立的标识符（象CreateWindow中hMenu参数指定的或创建子窗口的CreateWindowEx指定的那样），GetDlgltem就会返回一个有效的句柄到子窗口。getdlgitem

Windows CE：GetDlgltem函数只为对话框中的直接于控制工作，它不通过嵌套的对话框来搜寻。

速查：Windows NT：3.1及以上版本；Windows:95及以上版本；WindowsCE：1.0及以上版本；头文件：winuser.h;库文件：user32.lib。getdlgitem

多数以GetDlgitem（控件标识符）来使用

2用法：C#

IntPtr hwnd;

IntPtr hwnd1;

IntPtr hwnd2;

IntPtr hwnd3;

IntPtr hwnd4;

hwnd = FindWindow(null, 'QQ2011');

hwnd1 = GetDlgItem(hwndQQ, 0);

hwnd2 = GetDlgItem(hwnd1, 0);

hwnd3 = GetDlgItem(hwnd2, 894);

SendMessage(hwnd3, 194, 0, this.txtInput.Text);

hwnd4 = GetDlgItem(hwnd1, 1);

SendMessage(hwnd4, 245, 0, Convert.ToString(0));/*

GetDlgItem Function

TheGetDlgItemfunction retrieves a handle to a control in thespecified dialog box.

Syntax

HWND GetDlgItem(

HWNDhDlg, intnIDDlgItem);

Parameters

hDlg[in] Handle to the dialog box that contains thecontrol.nIDDlgItem[in] Specifies the identifier of the control tobe retrieved.

Return Value

If the function succeeds, the return value is the window handle ofthe specified control.

If the function fails, the return value is NULL, indicating aninvalid dialog box handle or a nonexistent control. To get extendederror information, call GetLastError.

Remarks

You can use theGetDlgItemfunction with any parent-child windowpair, not just with dialog boxes. As long as thehDlgparameterspecifies a parent window and the child window has a uniqueidentifier (as specified by thehMenuparameter in the CreateWindoworCreateWindowExfunction that created the childwindow),GetDlgItemreturns a valid handle to the child window.

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