How to use 256 Color Bitmaps in ImageList (Win32 SDK solution)

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This is how to use 256(or 16bit, 24bit)-color bitmaps in ImageLists for ListViews, TreeViews, etc...

Usually you use something like this to load/create your imagelist:

hScreens = ImageList_LoadImage(GetModuleHandle(NULL),
 MAKEINTRESOURCE(BMP_SCREENS), 100, CLR_NONE, CLR_NONE, IMAGE_BITMAP,
 LR_LOADTRANSPARENT);

However it will always convert your bitmap to 16 colors or fail. now, simply replace it with this code:
HBITMAP hScrBM;

hScreens = ImageList_Create(100, 70, ILC_COLOR8, 0, 999);
hScrBM = LoadImage(GetModuleHandle(NULL),
 MAKEINTRESOURCE(BMP_SCREENS256), IMAGE_BITMAP, 0, 0,
 LR_LOADTRANSPARENT);

ImageList_Add(hScreens, hScrBM, NULL);

DeleteObject(hScrBM);

Of course, you can use other values instead of ILC_COLOR8 (256color): ILC_COLOR16, ILC_COLOR24, ... (see "ImageList_Create()" online help in VC++)

Hope this helps...



Comments

  • Using hi/truecolor bitmaps in imagelists (MFC solution)

    Posted by Legacy on 02/11/1999 12:00am

    Originally posted by: Bartosz Bien

    Hi,
    
    

    You can also use MFC solution to use hi/truecolor bitmaps in imagelists. The following functions
    do nearly the same that you have achieved using Platform SDK:

    CBitmap::LoadBitmap
    CImageList::Create(int cx, int cy, UINT nFlags, int nInitial, int nGrow)
    CImageList::Add
    CBitmap::DeleteObject

    In CImageList::Create, use ILC_MASK | ILC_COLOR24 (bpp as needed).

    Regards,
    Bartosz Bien

    Reply
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