fix bug : the font selected of mSpinBox object is not effective on runt time.
Created by: 10km
Bug descriptsion:
the font selected by mSpinBox object is not effective on runt time.
REASON:
mSpinBox_wndProc function don't respond message MSG_FONTCHANGED,
SOLUTION:
moditiy the mSpinBox_wndProc ,add respone of MSG_FONTCHANGED , set font of child editor.
fixed another issue:
replace all of hardcode 100 that represent for editor id with a new preprocessor EDITOR_CHILD_ID