Using SendMessage and WM_PASTE not working

Question

3.50/5 (2 votes)

See more:

Here is my code:

C#

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);

private const int WM_PASTE = 0x0302;

public void Paste()
        {
            Process proc = Process.GetCurrentProcess();
            SendMessage(proc.MainWindowHandle, (UInt32)WM_PASTE, (IntPtr)0, (IntPtr)0);
        }

The result is, well, nothing! Any advice?

Posted 10-Jun-11 2:10am

DominicZA

Add a Solution

Comments

yesotaso 10-Jun-11 8:21am

See similar discussion:SendMessage API and WM_PASTE

[no name] 11-Jun-11 15:05pm

If there is no receiver who handles the message, of course nothing happens..

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

#realJSOP · Answer 1 · 2011-06-10T02:19:00

Solution 1

0) Is the window you're sending the message to handling the WM_PASTE command?

1) Are you sure the clipboard contains an object that is compatible with the window in which you're pasting it?

2) Most of the time, only edit controls handle the WM_PASTE command. It looks like you're trying to make your main form do it (instead of an edit control IN the form).

Posted 10-Jun-11 2:19am

#realJSOP

Comments

Sergey Alexandrovich Kryukov 10-Jun-11 19:12pm

Correct, a 5. Besides, the whole idea is bad.
Please see my answer.
--SA

DominicZA 13-Jun-11 2:11am

0) Not sure if the window is handling it! How can I check?

1) I am sure the clipboard contains text and I am trying to paste in notepad.

2) How do I access he edit control??

Sergey Alexandrovich Kryukov · Answer 2 · 2011-06-10T13:11:00

The typical window which supports WM_PASTE is some text-editing control or some image editing control, may be something else. It's virtually never a main window.

Besides, the whole idea is bad. You support good clipboard copy function, the user knows when to do the rest. If the application where you want to paste, this functionality is simply not needed. You need to integrate it in one application.

—SA