How to use SendMessage?

[bennyn]

Hello, I need to get a text from a "RichEdit20W" textarea. The internal Macro Scheduler function "GetWindowTextEx" does not fulfill my needs because it only gets the text which can be seen on top but the textarea has got a scrollbar and I want to get all of the text (even from the bottom of the textarea).

In C++ I did this with the following statement:

Code: Select all

SendMessage(handle, WM_GETTEXT, 25000, (LPARAM) buffer);

In MacroScheduler I tried it with:

Code: Select all

LibFunc>User32,FindWindowExA,handle,hwnd,0,RichEdit20W,0
LibFunc>User32,SendMessageA,result,handle,13,25000,0

My problem is, that I do not know how to set the (LPARAM) buffer when using SendMessageA in MacroScheduler. Therefore I passed a "0" for it but this does not work. Can anyone tell me how to set (LPARAM) buffer in MacroScheduler? This would be nice.

Greetings

Benny

[Marcus Tettmar]

Let>buffer_SIZE=1024
LibFunc>User32,SendMessageA,result,handle,13,25000,buffer
MessageModal>result_4

[bennyn]

Let>buffer_SIZE=1024
LibFunc>User32,SendMessageA,result,handle,13,25000,buffer
MessageModal>result_4

Many thanks for the answer. I got it now with:

GetWindowHandle>My Window Title,hwnd
LibFunc>User32,FindWindowExA,handle,hwnd,0,RichEdit20W,0
Let>buffer_SIZE=2560
LibFunc>User32,SendMessageA,result,handle,13,25000,buffer
MessageModal>result_4

The only problem I have now is that a buffer size of 2560 bytes is too small. If I change it to 2810 (or even more) then the MacroScheduler freezes. The text I want to get has about 13662 bytes. Is there any chance to get it?

[Marcus Tettmar]

You're setting your buffer size to a size smaller than the max number of characters you are asking it to extract. So this would cause a crash/hang. You probably want something like:

Let>buffer_SIZE=25000
LibFunc>User32,SendMessageA,result,handle,13,25000,buffer
MessageModal>result_4

You should be fine if the buffer size is equal to or larger than the value you're passing in lparam which for WM_GETTEXT is the max number of chars to copy.

And you should also extract the string from result_4 up to the null character so that you're not reading past the end of the returned data.