# Function Reference

DllOpen

Opens a DLL file for use in DllCall.

DllOpen ( "filename" )

Parameters

filename | Filename of the DLL file to open.

Return Value

Success: | Returns a dll "handle" to be used with subsequent Dll functions.
Failure: | Returns -1 if error occurs.

Remarks

Up to 64 files can be open simultaneously by one AutoIt script.
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.

Related

DllCall, DllClose

Example

$dll = DllOpen("user32.dll")
$result = DllCall($dll, "int", "MessageBox", "hwnd", 0, "str", "Some text", "str", "Some title", "int", 0)
DllClose($dll)