RE: [Mingw-users] OLE test program works with MSVC but fails with MinGW?

[Viatcheslav B. <sl...@el...>]

Try to use VARIANT_TRUE constant as a value of the parameter insted of 1
(actually OLE's TRUE is -1) and  VT_BOOL as a type.

HTH

Slav.

-----Original Message-----
From: Tom Blauwendraat [mailto:an...@dd...]
Sent: 17 April 2002 13:45
To: min...@li...
Subject: [Mingw-users] OLE test program works with MSVC but fails with
MinGW?


Hello,

I was looking on MSDN for help on controlling the IDispatch object, and
I found an example. In MSVC it compiles ok, and does what it is supposed
to. But when I try this example in MinGW (1.1) it compiles ok but
doesn't work.

The example is supposed to start Excel using CoCreateInstance, and use
the IDispatch object to tell the window to make itself visible. As far
as I can see the first part is ok, I see a program "Excel" pop up and
disappear in my task list correctly. But the window doesn't become
visible. I figure this must have something to do with the Variant that
is used to transfer the "Visible" parameter. But I can't see anything
wrong with the example.

I hope one of you can take a look at it and tell me what's wrong or if
MinGW supports this at all. I included a ZIP file "testcase.zip" with
the source and two batchfiles, one i use for compiling MW the other for
MSVC.

Tom