How to dock the RollDownPalette (Solved)

satoshi shimokura — Fri, 23 Jan 2026 02:47:26 GMT

Thank you for your continued support.

I apologize for the sudden post.

Regarding the article "How to dock the RollDownPalette" that I posted in the past,
although a long time has passed since the original post, I recently received a message from NMK195 with the solution, and it turns out that docking is indeed possible. I would like to share this information.

(Since I could no longer add to that post, I'm creating this as a new thread.)

The method is quite simple: specify UD::IRollPanel::HVGrow as the argument for the SetGrowType() function that is executed in the constructor of each tab page contained in the roll-down palette.

UD::IRollPanel* Panel_A = rollDownPanelSet->CreateRollDownPanel(); Panel_A->SetTitle(RSGetIndString(ID_ROLLDOWN_PARETTE, 2, ACAPI_GetOwnResModule())); Panel_A->SetGrowType(UD::IRollPanel::HVGrow); //<-- Docking possible by setting up 'HVGrow'

In the past, I had set this to UD::IRollPanel::NoGrow, which prevented docking.

Additionally, like regular palettes, it's necessary to assign a Guid to the palette.

If these conditions are met, the roll-down palette can be docked to Archicad.

Thank you very much to NMK195 for providing this information.

I'm leaving source files that can build a dockable roll-down palette. (It can be executed in Archicad 28.)

I hope this post will be helpful to everyone.

topic How to dock the RollDownPalette (Solved) in Archicad C++ API

How to dock the RollDownPalette (Solved)