Declaration:
void SetBkMode(unsigned long handle, int mode);
Description
Sets the text display mode for the window. For the mode parameter, the system.h system header file contains two constants: OPAQUE and TRANSPARENT. When text is displayed (see DisplayText, DisplayTextF) and the display mode is set to OPAQUE, then the rectangle with text will be first filled with the background color. In the TRANSPARENT mode, the text overlaps the previous output.
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