DefineDLLFunction
NETLink`
NETLink`
DefineDLLFunction
DefineDLLFunction["func","dll",rtype,atypes]
returns a Wolfram Language function that calls the specified function func with argument types atypes and return type rtype in the specified unmanaged DLL dll.
DefineDLLFunction["declaration"]
lets you write a full C#-syntax 'extern' function declaration. Use this form when you need to write a complex function declaration that requires features not available using options to DefineDLLFunction, such as specific "MarshalAs" attributes on each of the parameters.
Details and Options
- To use DefineDLLFunction, you first need to load .NET/Link using Needs["NETLink`"].
- The following options can be given:
-
CallingConvention Automatic the calling convention expected by the DLL function (possible values are "StdCall", "CDecl", "ThisCall", and Automatic.) MarshalStringsAs "ANSI" how string arguments (char*, string, String) should be marshaled to and from the DLL function (possible values are "ANSI", "Unicode", and Automatic) ReferencedAssemblies Automatic a list of the names of assemblies referenced by your declaration - The atypes argument is a list of type specifications for the arguments, and can be omitted if the function takes no arguments.
- The argument type and return type specifications are strings or, less commonly, NETType expressions.
- Strings can be given in C-style syntax (such as "char*"), C#-syntax ("string"), Visual Basic .NET syntax ("ByVal As String"), or by using many Windows API types (such as "HWND", "DWORD", "BOOL", and so on).
- Priority is given to the C interpretation of type names, so char and long have their meanings in C (1 and 4 bytes, respectively), not C#.
- You need to give the full pathname to the DLL if it is not located in a standard location (standard locations are a directory on your system PATH or a DLL subdirectory in a Wolfram System application directory, such as $InstallationDirectory\AddOns\Applications\SomeApp\DLL).