BCGControlBar Pro for MFC
static void CBCGPToolBar::SetLargeIcons ( BOOL  bLargeIcons = TRUE)

Sets a flag indicating whether toolbar buttons display large icons or regular icons.

This flag is usually set from the customization dialog. When this flag is set, all toolbars are resized automatically.

By default, this flag is set to FALSE.

bLargeIconsTRUE - display large icons; FALSE - display regular icons.