3.2.5.4.6 MILCMD_WINDOWNODE_SETSOURCEMODIFICATIONS

To set source modifications on a window node resource, the server MUST send a MILCMD_WINDOWNODE_SETSOURCEMODIFICATIONS message to the targeted window node resource. The sourceModifications and color key message fields specify how the content of the targeted window node MUST be blended with the background:

sourceModifications: Contains the modification flags (MilSourceModification).

LowColorKey: Contains the low end of the color range, which will be drawn as transparent. This field is meaningful only if the sourceModifications field is set to ColorKey (0x00000002). This is in B8R8G8A8 format.

HighColorKey: Contains the high end of the color range, which will be drawn as transparent. This field is meaningful only if the sourceModifications field is set to ColorKey (0x00000002). This is in B8R8G8A8 format.