iFlags

The flags are in four groups that define treatment of the source, treatment of the destination, the operation to use when combining the data, and the treatment of the resulting image. The flags apply only to the defined rectangles (not necessarily the whole bitmap). You can use a bitwise OR ( | ) to specify one flag from each group.

For a simple paste, use CB_OP_ADD and CB_DST_0 as the flags.

Refer to Flags for the Combine Method for the list of flags.