How to set another program's textbox's text using cyrillic?

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I know how to set another program's textbox's text using english letters, but how can I set text using cyrillic letters?

That's how I do it.

C#

SendMessage(hwnd, WM_SETTEXT, 0, "Привет");

I also tried to do:

C#

SendMessage(hwnd, WM_SETTEXT, 0, Encoding.Unicode.GetString(Encoding.ASCII.GetBytes("Привет")))

but that just sets text to "?????"...

EDIT:
Figured it out how to do it.

Needed to assign SendMessage like that:

C#

[DllImport("user32.dll", CharSet = CharSet.Unicode)]
private static extern int SendMessage(IntPtr hWnd, int msg, int Param, string str);

Instead of:

C#

[DllImport("user32.dll")]
private static extern int SendMessage(IntPtr hWnd, int msg, int Param, string str);

Posted 6-Jun-12 4:46am

vozochris

Updated 6-Jun-12 6:57am

v3

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Sergey Alexandrovich Kryukov 6-Jun-12 12:56pm

Why on Earth?
--SA

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-06-06T06:54:00

You are trying to do dirty business, communication between different processes in the outlaw Windows-specific way. Processes are well isolated, and communication via messages is Windows perverted style which was rendered obsolete since the introduction of NT, but supported ever since.

What you are trying cannot work because you do it in non-Unicode way. First of all, the foreign application you are trying to send message to should be compiled to support Unicode, which may or may not be the case; if not, nothing will work. Secondly, you should use "wide" form of SendMessage and marshal the string accordingly. Try this:

C#

using System.Runtime.InteropServices;

//...

const string DllName = "User32.dll";

//...

[DllImport(DllName, EntryPoint="SendMessageW")] // SendMessageW instead of SendMessage
static extern void SendMessage(IntPtr windowHandle, UInt32 message, UInt32 wParam, [MarshalAs(UnmanagedType.LPWStr)] string message);

The numeric types should depend on the target platform. If I'm not much mistaken, all numeric parameters becomes Uint64 on 64-bit instruction-set architectures.

Please try — I did not test it. Anyway, you got the idea.

—SA