BCGControlBar Pro for MFC
void CBCGPAppBarWnd::SetAlwaysOnTop ( BOOL  bEnable)

Enables or disables the always-on-top mode.

When the always-on-top mode is enabled, the application bar should be a topmost window. Otherwise, it has normal Z-order. By default the always-on-top mode is disabled.

Parameters
bEnableIf TRUE, always-on-top mode is enabled. If FALSE, always-on-top mode is disabled.