Thanks for the response! Hmm ok, I could find the following information using OLEView (se attachment). It states that the two in parameters are noted as VT_LPWSTR for the scriptCmd command. Would that mean that I have no way of interfacing with them at all? I would prefer exhausting what I can do using python before I contact the company, although if that is the only route available I will take it.
Kind Regards, Olle On Fri, Jan 22, 2021 at 5:26 AM Mark Hammond <skippy.hamm...@gmail.com> wrote: > > On 21/01/2021 10:00 pm, Olle Pontén wrote: > > Hello! > > > > I'm quite new to the pywin32 package (as in I have never interacted with > > it before). > > I'm currently trying to implement a python interface to a win32 bit > program > > that I can connect to using the ordinary win32com.client.Dispatch method. > > This program controls an microscope camera and the only way to connect to > > it is via this COM connection. > > There is already an version of this software written in pascal by the > > manufacturers > > so I'm trying to create an expanded python version of this software. > > > > I've managed to get the connection working and I can send commands that > > do not > > require any inputs and access the attributes of the interface/program. > > > > The problem is that when I try to send commands to one of two exposed > > methods that require input I get the > > follow error: > > > > s = win32com.client.VARIANT(pythoncom.VT_LPWSTR, 'On\0') > > > > r = win32com.client.VARIANT(pythoncom.VT_LPWSTR, 'AL\0') > > > > Response = AIPam.scriptCmd(r,s) > > Traceback (most recent call last): > > > > File "<ipython-input-38-c5635b52a462>", line 1, in <module> > > Response = AIPam.scriptCmd(r,s) > > > > File > > > "C:\Users\GWHLAB~2\AppData\Local\Temp\gen_py\3.8\E07C24C7-56CE-409F-AB60-DC7EDE9D9888x0x1x0.py", > > > line 37, in scriptCmd > > return self._oleobj_.InvokeTypes(216, LCID, 1, (3, 0), ((31, 1), > > (31, 1)),cmd > > > > TypeError: The VARIANT type is unknown (0x0000001f) > > If you look at > > https://docs.microsoft.com/en-us/windows/win32/api/wtypes/ne-wtypes-varenum#remarks, > > VT_LPWSTR is not valid in a VARIANT, so pywin32 doesn't let you create > them. Use VT_BSTR (or just pass a Python string) and see if that works - > if it doesn't you probably need to contact the vendor of the package. > > HTH, > > Mark >
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