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I have a COM function written in C++ using some VARIANT pointer as argument to return a value. I want to call that function with Python but I run out of solutions;

I tried to use VARIANT(pythoncom.VT_VARIANT | pythoncom.VT_BYREF, value) from pywin32 and pythonnet python libraries with no success.

Here is the syntax of the COM function:

object.ExtendedGetSourceName(int iSource, VARIANT* ovSourceName) as Boolean

with:

object: a COM object
iSource: index of the source (starting from 0)
ovSourceName: name of the source

ovSourceName gets the returned value.

import win32com.client
import pythoncom

xmpmapPath = r"C:\LM.Irradiance.1.xmp"
XMPViewer = win32com.client.Dispatch("XMPViewer.Application") # START INSTANCE
XMPViewer.OpenFile(xmpmapPath)# Opens XMP file
iNbSource = XMPViewer.ExtendedGetNbSource #Returns the number of sources
for sourceindex in range(0, iNbSource):
    sSourceName = win32com.client.VARIANT(pythoncom.VT_VARIANT | pythoncom.VT_BYREF, 1)

    RetVal = XMPViewer.ExtendedGetSourceName(sourceindex,  sSourceName) #Returns TRUE if the call has succeeded, FALSE otherwise.
    print(str(RetVal))
    print(str(sSourceName))

Visual Studio Codes returns

True
win32com.client.VARIANT(16396, 1)

Would you know how to make a COM variant pointer, then get its returned in Python?

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