How can I access the functions inside a third-party DLL from VBA (Excel)? Also, is there a way to see what all functions are available inside a DLL?
To call a function in a third-party DLL, you need to use the
Declare statement. For example:
Private Declare Function GetTempPath Lib "kernel32" _ Alias "GetTempPathA" (ByVal nBufferLength As Long, _ ByVal lpBuffer As String) As Long
See How to: Access DLLs in Excel on MSDN for more information.
To list the functions that are available, take a look at the Dependency Walker tool, which will list the exported functions from DLLs (and lots of other information).