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[WinApi] C#获取其他窗口文本框内容

程序员文章站 2022-06-05 08:46:02
声明部分: const int WM_GETTEXT = 0x000D; const int WM_GETTEXTLENGTH = 0x000E; [DllImport("user32.dll", EntryPoint = "SendMessageA")] public static extern ......

声明部分:

const int wm_gettext = 0x000d;
const int wm_gettextlength = 0x000e;
 
[dllimport("user32.dll", entrypoint = "sendmessagea")]
public static extern int sendmessage(intptr hwnd, int wmsg, int wparam, byte[] lparam);
 
[dllimport("user32.dll", entrypoint="sendmessagea")]
public static extern int sendmessage(intptr hwnd, int wmsg, int wparam, int lparam);

 

函数部分:

intptr mwh = findmainwindowhandle("窗口名称", 100, 25);  //主窗口句柄
intptr hwndstatue = findwindowex(mwh, intptr.zero, "edit", null);   //文本框句柄
 
if (hwndstatue != intptr.zero)
{                
    int textlen;
    textlen = sendmessage(hwndstatue, wm_gettextlength, 0, 0);
    byte[] byt = new byte[textlen];
    sendmessage(hwndstatue, wm_gettext, textlen + 1, byt);
    string str = encoding.default.getstring(byt);
}