How Can I Make A Keyboard Like One-Screen Keyboard Of Windows 7 with C# Win-App ?

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I have a Form with a button . I want to press the Button in form instead of "W" key on keyboard and the "W" key become active and write in notepad "W". That's very simply .

Are there any Class or Method for this action.

Posted 3-Jul-15 9:49am

mehrdad72

Updated 3-Jul-15 14:30pm

Afzaal Ahmad Zeeshan

v4

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[no name] 3-Jul-15 16:40pm

What?

mehrdad72 3-Jul-15 16:56pm

Have you ever seen On-Screen Keyboard ?

[no name] 3-Jul-15 17:07pm

Yes I have. How does that make your not-a-question any clearer? What code have your written? What is the problem with the code that you have written? Have you done any research at all?

Afzaal Ahmad Zeeshan 3-Jul-15 20:30pm

Is it very simple, then why not you create it yourself?

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yaser shadmehr · Answer 1 · 2015-07-03T14:34:00

C#

[System.Runtime.InteropServices.DllImport("user32.dll", EntryPoint = "FindWindowEx")]
public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

[System.Runtime.InteropServices.DllImport("User32.dll")]
public static extern int SendMessage(IntPtr hWnd, int uMsg, int wParam, string lParam);

public const int WM_SETTEXT = 0x000c;
internal void SendText(string content)
{
     var notepads = System.Diagnostics.Process.GetProcessesByName("notepad");

     // if Applicable, it runs Notepad Process
     //if (notepads.Length == 0)
     //    notepads = new System.Diagnostics.Process[]  System.Diagnostics.Process.Start("notepad") };

     if (notepads.Length > 0 && notepads[0] != null)
     {
         IntPtr child = FindWindowEx(notepads[0].MainWindowHandle, new IntPtr(0), "Edit", null);
         SendMessage(child, WM_SETTEXT, 0, content);
     }
}