学步园

C#打开记事本并填写内容代码如下：

using System.Runtime.InteropServices;  
using System.Diagnostics; 

[DllImport("User32.DLL")] 
public static extern int SendMessage(IntPtr hWnd,  
uint Msg, int wParam, string lParam); 
[DllImport("User32.DLL")] 
public static extern IntPtr FindWindowEx(IntPtr hwndParent, 
    IntPtr hwndChildAfter, string lpszClass, string lpszWindow); 
public const uint WM_SETTEXT = 0x000C; 
private void button1_Click(object sender, EventArgs e) 
{ 
    Process vProcess = Process.Start("notepad.exe"); 
while (vProcess.MainWindowHandle == IntPtr.Zero) vProcess.Refresh(); 
    IntPtr vHandle = FindWindowEx(vProcess.MainWindowHandle,  
        IntPtr.Zero, "Edit", null); 
    SendMessage(vHandle, WM_SETTEXT, 0, "Zswang 路过"); 
}