Extern Object:

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‘UTILITY OBJECTS – E X T E R N

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Description:

Declares references to external procedures which are stored with a dynamic-link library (DLL).   

Syntax:

Extern.Declare (RetType, MethodName, LibName, Alias [, ArgType(s)])  

Example:

'FindWindowA is a function in user32.dll. This function is used to find a window which is currently opened on Desktop. 

'This function takes two string inputs NativeClass & Title of the Window. 

'This will return a handler value of the identified window. 

'If it is returned 0 then there is no window found 

‘Getting the Handle for the Notepad Window

strHWND = Extern.FindWindow ("Notepad", vbNullString)  

‘Finding the Notepad Application Opened

If strHWND = 0 Then  

MsgBox "Notepad Application NOT Opened"  

Else 

MsgBox "Notepad Application Opened"  

End If

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