Opens a DLL file for use in DllCall.
DllOpen ( "filename" )
|filename||Filename of the DLL file to open.|
|Success:||a dll "handle" to be used with subsequent Dll functions.|
|Failure:||-1 if error occurs.|
When finished working with a dll, call the DllClose() function to close it. AutoIt normally closes all files upon termination, but explicitly calling DllClose() is still a good idea.