What is an: Extern object

Enables you to declare calls to external procedures from an external dynamic-link library (DLL).

Syntax –

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

Example –

'Declare FindWindow method
 
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Extern.Declare micHwnd, "FindWindow", "user32.dll", "FindWindowA", micString, micString
 
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'Declare SetWindowText method
 
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Extern.Declare micLong, "SetWindowText", "user32.dll", "SetWindowTextA", micHwnd, micString
 
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'Get HWND of the Notepad window
 
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hwnd = Extern.FindWindow("Notepad", vbNullString)
 
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if hwnd = 0 then
 
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MsgBox "Notepad window not found"
 
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end if
 
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'Change the title of the notepad window
 
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res = Extern.SetWindowText(hwnd, "kuku")

Additional Reading

How to load a DLL with QTP?