dll_obj = Load DLL("path" <, AutoDeclare(Boolean | Quiet | Verbose) |Quiet | Verbose > )
Load DLL() loads the DLL in the specified path. Use the AutoDeclare(Quiet) argument to suppress log window messaging.
Use the Declare Function message to declare a function that is defined in the DLL.After you declare the function, you can call it.
dll_obj <<Declare Function("name", Convention(named_argument), Alias("string"), Arg(type, "string"), Returns(type), other_named_arguments)
The Alias defines an alternate name that you can use in JSL. For example, if you declared Alias("MsgBox") for a function that is named "Message Box" in the DLL, then you would call it as follows:
result = dll_obj <<MsgBox(...)
The named arguments for Convention are as follows:
The type argument for both Arg and Returns can be one of the following:
See Dynamic Link Libraries (DLLs) the JSL Syntax Reference for the Declare Function message arguments.
Finally, use the UnLoadDLL message to unload the DLL:
dll_obj << UnLoadDLL
If( Host is( "Windows" ),
		Host is( "Bits64" ),
		// Load the 64-bit DLL.
			dll_obj = Load DLL( "c:\Windows\System32\user32.dll" ),
		// Load the 32-bit DLL.
			dll_obj = Load DLL( "c:\Windows\SysWOW64\user32.dll" ),
		// If neither DLL is found, stop execution.
	dll_obj <<DeclareFunction(
		Convention( STDCALL ),
		Alias( "MsgBox" ),
		Arg( IntPtr, "hWnd" ),
		Arg( UnicodeString, "message" ),
		Arg( UnicodeString, "caption" ),
		Arg( UInt32, "uType" ),
		Returns( Int32 )
	result = dll_obj << MsgBox(
		"Here is a message from JMP.",
		"Call DLL",
	Show( result );
dll_obj << UnLoadDLL
dll_obj << Show Functions;
If you are writing your own DLL, you can create functions in it using JSL. The Get Declaration JSL message sends any JSL functions in your DLL to the log:
dll_obj << Get Declaration JSL;

Help created on 7/12/2018