Convert HBITMAP into VARIANT for excel add-in (C++)

Question

0.00/5 (No votes)

See more:

I have a resource bitmap that I want in the ribbon in an Excel Add-in.

I am not using MFC or ATL.

What I have tried:

I am using IDispatch Invoke for the call to getImage from ribbon xml.

I can return a string (VARIANT - BStr) representing one of the built-in Excel images but I want to return a resource Bitmap instead.

Posted 17-Jun-18 11:54am

benjaminemanuel13

Updated 18-Jun-18 1:40am

v2

Add a Solution

Comments

[no name] 17-Jun-18 19:36pm

Does this help: How to load the .bmp to the button in developping Ribbon Using XML[^]?

benjaminemanuel13 17-Jun-18 19:55pm

Thanks, but that solution is using (I think) MFC and I'm using raw c++.

Jochen Arndt 18-Jun-18 3:26am

Please show the dispatch function declaration / description. If it is a IPictureDisp
(see https://msdn.microsoft.com/en-us/library/windows/desktop/ms680762(v=vs.85).aspx) callback function, just return the HBITMAP handle by casting to the return type.

benjaminemanuel13 18-Jun-18 6:47am

Indeed, I create an IPictureDisp from the bitmap, set the VARIANT Type to VT_DISPATCH, set the VARIANT pdispVal to point to the picture and hey presto, it works! Thanks a lot!!

KarstenK 18-Jun-18 7:34am

write it as answer to close the Q&A

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

benjaminemanuel13 · Accepted Answer · 2018-06-18T01:41:00

Solution 1

I simply needed to create an IPictureDisp from the resourced bitmap and in Invoke set the returned VARIANT type to VT_DISPATCH, set the VARIANT pdispVal value to the IPictureDisp and return it for the getImage function.

Posted 18-Jun-18 1:41am

benjaminemanuel13