Loading icon with alpha for use with XTP

 

I'm making a dynamic menu now and the icons are loaded at runtime either from memory buffer or from ICO file. I'm using the same ICO file imported into CommandBar Designer (and using Axialis) to confirm the icon has all the bits including alpha included in the file.

 

My question is: What is the correct way to load an icon, either from ICO file or from bits in memory, so that it works correctly with XTP's controls and compositing. When I use ExtractIcon it doesn't preserve the alpha. When I use LoadImage I get mixed results based on settings but nothing seems quite right. 

 

Any pointers are appreciated.

Thanks!

Hi,

 

Don't use LoadImage or SetCustomIcon.

 

use this method:

BOOL CXTPImageManager::SetIcon(UINT nIDResourceIcon, UINT nIDCommand, CSize szIcon, XTPImageState imageState)

 

 

where nIDResourceIcon is your Alpha ico file resource. - it will load alpha icon and set it for nIDCommand command.

Hi,

You can load external ICO with

 

HBITMAP CXTPImageManagerIcon::LoadAlphaIcon(LPCTSTR pszFileName, int nWidth)

method and then add it with

CXTPImageManager::SetIcon(CXTPImageManagerIconHandle hIcon, UINT nIDCommand, CSize szIcon, XTPImageState imageState)