How to send an "ENTER" key press to another application?

delphi sendmessage
JosephStyons picture JosephStyons · Sep 16, 2009 · Viewed 27.4k times · Source

I have code that launches an external application and automatically fills in a password prompt.

I want to automate the pressing of the "ENTER" key, so that the user does not have to click "OK".

How can I send the ENTER key to an external application?

Below is my code as it stands right now.

The first line to post the password to the application works fine.

The second line to send an ENTER key press has no effect at all.

I am using Delphi 2010.

    //now that we have the control handle, send the password to it
    SendMessage(AppHandle,WM_SETTEXT,0,Integer(PChar(pwd)));

    //and now push ENTER
    SendMessage(AppHandle,WM_KEYDOWN,0,Integer(PChar(#13)));

Answer

RRUZ picture RRUZ · Sep 16, 2009

Try this

PostMessage(AppHandle, WM_KEYDOWN, VK_RETURN, 0);

Bye.

Related questions

How can I move the cursor to the end of the text (Delphi)?

This is my code to fill a TextBox using the SendMessage function: C := 'Hey there'; SendMessage(h1, WM_SETTEXT, 1, Integer(PChar(C))); Now, how can I move the cursor to the end of the text?

Read More
Sending Keystroke to another application using WinAPI

I have to control another application by sending keystrokes to it like CTRLS or CTRLSHIFTC or CTRLF. I've tried a lot of things, but I can't get it working. So I'm trying to get this right on a simpler case. …

Read More
The application was unable to start correctly (0xc000007b)

I have a client/server app which I have been developing on a single PC. Now it needs two serial ports, so I borrowed a PC from a friend. When I build my app and try to run or debug …

Read More