BITMAPINFOHEADER2 Field - cclrImportant

cclrImportant (ULONG)

Number of important color indexes. The first cclrImportant color entries are important. A zero (default) means that all are important. For a 24-bit count standard, these colors also are listed in the ulColorEncoding color array.

This information helps to make palette management more responsive to an application's needs. The important colors are more likely to be assigned to the device palette, while others might be mapped to the nearest colors available.

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