BCGControlBar Pro for MFC
void CBCGPStatusBar::SetPaneWidth ( int  nIndex,
int  cx,
BOOL  bExactWidth = FALSE 

Sets indicator width for a given index.

Call this member function to set the width of a status bar's pane.

nIndexIndex of the pane whose width is to be set.
cxWidth of the pane.
bExactWidthSpecifies whether to ignore internal pane paddings.