ZeeImage Control Message
ZIM_SETTRANSPARENTCOLOR
ZIM_SETTRANSPARENTCOLOR
An application sends a ZIM_SETTRANSPARENTCOLOR to set the color to be used for transparency for the next LOADIMAGE in the ZeeImage image list.
ZGM_SETTRANSPARENTCOLOR
wParam = Not Used; //Not used. Set to 0.
lParam = COLORREF; //COLORREF value for transparency
Parameters
-
wParam
-
The value of wParam. Not used. Set to 0.
-
lParam
-
The value of lParam. A COLORREF value to use as the transparency color for images that use transparency
Return Values
This message does not return a value.
Example
SendMessage(himage,ZIM_SETTRANSPARENTCOLOR,5,RGB(255,255,0));
Note:
Images that use transparency (PNG, TIF) will use the transparency color set by this message to color the transparent part of the next loaded image.
The transparency color will remain in effect until it is changed with another ZIM_SETTRANSPARENTCOLOR message. The transparent color is white, RGB(255,255,255),
by default.
This message ONLY affects the next loaded image. This message by itself will do nothing to images that are already loaded.
Copyright © 2020 by David Hillard