You can use the hWnd property to determine the handle (a unique Long Integer value) assigned by Microsoft Windows to the current window.
Setting
This property is read-only and is available only by using a macro or Visual Basic.
Remarks
You can use this property in Visual Basic when making calls to Windows application programming interface (API) functions or other external routines that require the hWnd property as an argument. Many Windows functions require the hWnd property value of the current window as one of the arguments.
Caution Because the value of this property can change while a program is running, don't store the hWnd property value in a public variable.