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Is there anyway to input text from one program into the textbox of another and then retrieve the resulting output?

Posted on 2004-09-05
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Last Modified: 2010-04-23
I am looking for a way to input text from my program into the textbox of another. I want a way of inputing text in one of my programs, and then having that text input into a program such as Outlook, or possibly another program that I coded ?

Is there any way possible I can do that ?
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Question by:jorgenoctem
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Javert93 earned 20 total points
ID: 12008894
The short answer to your question is that it is possible, but it is extremely difficult and error-prone. You can set the text in a textbox outside of your process by sending WM_SETTEXT messages to the target textbox. However, the difficult part is getting the window handle you need to send the message. You must first enumerate all of the top-level windows using the EnumWindows API to get a handle to the window that contains the text box. You must then use that handle in a call to the EnumChildWindows API until you locate the target text box (you will have to use the GetClassName API to detemine if it is a textbox). Once you have the handle, you can start sending message to the textbox, but be warned, if the target window contains more than one textbox, you will have to perform some trial-and-error to make sure you have a handle to the right one. Also, if the control layout changes between application versions, then you will need a seperate routine to get the textbox handle for each version of the application.
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by:jorgenoctem
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Thank you very much, that was very helpful.
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