L_BM_INTENSITYDETECT

Send this message to filter an L_BITMAPCLASS window's bitmap to detect colors in a specified intensity range.

Intensity levels range from 0 to 255 for each color plane (red, green, and blue). This function processes each plane separately. If a value falls within the range, it is raised to 255, and if it falls outside the range, it is lowered to 0.

Parameter	Description
wParam	Contains the wParam parameter of the WM_COMMAND message and specifies the child-window ID.
lParam	The low order of lParam should specify the lowest intensity to detect. The high order word should specify the highest intensity to detect.