BCGControlBar Pro for MFC
void CBCGPRibbonPaletteButton::SetCalcIconPositions ( BOOL  bSet = TRUE)
inline

Specifies whether the gallery item relative positions (e.g., first in the column) should calculated.

Parameters
bSetIf this parameter is TRUE, the gallery item relative positions will be calculated.

Call this method to enable or disable the calculation of relative positions for gallery items. Please note that enabling this option for gallery with a large number of items could significantly impact its performance.