Check state of buttons

This is a discussion on Check state of buttons within the Windows Programming forums, part of the Platform Specific Boards category; I used this code to get the state of a checkbox but it only check for its state as the ...

  1. #1
    Registered User
    Join Date
    Apr 2007
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    37

    Check state of buttons

    I used this code to get the state of a checkbox but it only check for its state as the window is intialised...So I wonder how to make it get the state each time the function contain the SendMessage is accessed.

    Code:
     if(SendMessage(hwnd,BM_GETCHECK,0,chk1)!=BST_CHECKED)
      {
       //process
      }

    Any simple guidance..even keywords to guide my search are welcomed..Thx

  2. #2
    Registered User
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    Apr 2007
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    37

    one way to monitor button click, any others?

    I figured one way of doing it...by using a flag and setting its status when the checkbox has been clicked

    I used this code in the case WM_COMMAND


    Code:
    case chk1:
    { 
          if(IsDlgButtonChecked(hwnd,chk1)==BST_CHECKED)
                status=1;
                else
                status=0;
    }break;
    Howver I still wonder if the state can be monitored out of the switch message, in another function.

  3. #3
    Mad OnionKnight's Avatar
    Join Date
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    Umeň, Sweden
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    The LPARAM of the BM_GETCHECK message should be 0. If hwnd isn't the handle to your checkbox you won't get what you want. There's a function that can retrieve the HWND of a control by specifying the parent window and the control's resource, but I don't remember right now.
    Howver I still wonder if the state can be monitored out of the switch message, in another function.
    Depends on what you mean by monitor. Sending a message to retrieve the value when needed is usually sufficient.

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