iType

Pointer to the binary filter to use. You can use one of the following predefined filters:

Value

Meaning

BFLT_EROSION_OMNI
BFLT_EROSION_HORZ
BFLT_EROSION_VERT
BFLT_EROSION_DIAG

Shrinks black objects in the bitmap. The effect is biased in the specified direction.

BFLT_DILATION_OMNI
BFLT_DILATION_HORZ
BFLT_DILATION_VERT
BFLT_DILATION_DIAG

Enlarges black objects in the bitmap. The effect is biased in the specified direction.