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How to determine the value of this parameter

the function of PostMessage(HWND hWnd,UINT Msg,WPARAM wParam,LPARAM lParam); and how to determine the value of wParam,I want to control the buttons by calling user32. DLL,and I've got the handle to this button,How to get and determine the parameters in the function,None of the examples I've got have a description of these parameters
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Hi Sam,

 


@sam_yu wrote:
the function of PostMessage(HWND hWnd,UINT Msg,WPARAM wParam,LPARAM lParam); and how to determine the value of wParam,

 


Look for the descriptions here

Best regards,
GerdW


using LV2016/2019/2021 on Win10/11+cRIO, TestStand2016/2019
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hi thanks for reply to my post,and I can't open the address you gave me,I got the relevant information from the MSDN, but it's still not very clear. How to determine these parameters? Can you help me have a look,and the VI have uploaded it 

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GerdW did not give you an address -- he suggested that you do a search (using Google, but feel free to use some other Search Engine) for the term "msdn postmessage".  You should be able to find the information you need by looking for it yourself.

 

Bob Schor

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