Shoutbox

In theory, you can use any functions provided in the Win32 API. However, there are some disadvantages Plus! Live has because its scripting engine isn't yet perfect. For example, you can't register a notification for a control since there's no Control object which could have a RegisterMessageNotification function, such function only exists for the PlusWnd object. Except from that, any function should work (unless I forgot something?).

Some examples:

• ShellExecute - Used to start a program. In this example the program "MyProg.exe" in the script folder with the parameter /JustDoIt, which should get recognized by the program.
  

  code:

  ---

  var Result = Interop.Call(
     /* Library to call */ "shell32",
     /* Function to call */ "ShellExecuteW",
     /* hWnd */ 0,
     /* lpOperation */, "open",
     /* lpFile */, MsgPlus.ScriptFilesPath + "\\MyProg.exe",
     /* lpParameters */ "/JustDoIt",
     /* lpDirectory */ 0,
     /* nShowCmd */, 0
  );
  if(Result <= 32) //If Result is less than or equal to 32, an error has been returned.
     Debug.Trace("ShellExecute returned an error! Result: "+Result);
  else
     Debug.Trace("ShellExecute succeeded");

  ---

• SendMessage - Used to send a window message to a window or window control. In this example, the window caption will be changed by the WM_SETTEXT message.
  

  code:

  ---

  //Window
  var PlusWnd = MsgPlus.CreateWnd("Windows.xml", "WndTest");
  //String for title
  var sTitle = "My New Window";
  //DataBloc for title
  var lpTitle = Interop.Allocate((sTitle.length+1)*2);
  lpTitle.WriteString(sTitle, 0);
  //Call SendMessage with WM_SETTEXT
  var Result = Interop.Call(
     /* Library to call */ "user32",
     /* Function to call */ "SendMessageW",
     /* hWnd */ PlusWnd.Handle,
     /* WM_SETTEXT */ 0xC,
     /* wParam */ 0,
     /* lParam */ lpTitle.DataPtr
  );
  if(Result != 1) Debug.Trace("SendMessage returned an error! Result: "+Result);

  ---

• PlusWnd.RegisterMessageNotification - Used to register a notification to a window and react on it. In this example we'll dump the new size of the window to the debug window when the user is resizing it.
  

  code:

  ---

  //Window
  var PlusWnd = MsgPlus.CreateWnd("Windows.xml", "WndTest");
  //Register message notification
  PlusWnd.RegisterMessageNotification(/* WM_SIZE */ 0x5, true);
  ...
  function OnWndTestEvent_MessageNotification(PlusWnd, Message, wParam, lParam) {
     if(Message == /* WM_SIZE */ 0x5) {
        var Width = lParam  & 0xFFFF; //Width is stored in low-order word of lParam
        var Height = lParam >> 16; //Height is stored in high-order word of lParam
        Debug.Trace("WndTest size: "+Width+"x"+Height);
     }
     return -1; //Let the window do its stuff with this message too
  }

  ---

Oh noees! I got beaten by vikke!

quote:

---

Originally posted by vikke
Note: Always use the unicode version of Win32 APIs instead of the ANSI version. So put a W after a function to use the unicode function (only on functions whichs contains one string in its parameters, all expect GetProcAddress).

---

True, I wanted to mention that but I forgot.