Thread: 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

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.

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.