Sets the amount of intercharacter spacing.
Specifies the amount of extra space (in logical units) to be added to each character. If the current mapping mode is not MM_TEXT, nCharExtra is transformed and rounded to the nearest pixel.
The amount of the previous intercharacter spacing.
GDI adds this spacing to each character, including break characters, when it writes a line of text to the device context. The default value for the amount of intercharacter spacing is 0.