How to remove ATL control from MATLAB after used?

MATLAB loaded the VC++ generated ATL/COM DLL, using actxserver: h = actxserver('....'); then invoked method. Now I wish to remove the control by delete(h). The purpose is to update the control DLL after modified VC++ code. However, the DLL cannot be replaced unless I quit MATLAB. How MATLAB can remove the control without quit MATLAB?

[EDITED, Jan, moved from answer section:]

MATLAB document and support said that delete/release should clear them up, but they don't.

[Jan]

Please explain, what "cannot replaced" exactly mean. Do you get an error message?

[Mathew]

Windows pops up message said "other program is using the DLL", so I cannot replace the DLL with new one, unless I quit MATLAB.

[Jan]

Please post your code. "Matlab said delete/release" does not allow to recognize, what you are doing exactly.

Please add all important information by editing the question, not in comments or answers. Teh readers expect all details inside the question and collecting the parts from different sections is confusing. Thanks.

Answer 1

[Jan]

Did you try

h.Quit
h.delete
clear h

?

Answer 2

[Mathew]

MATLAB does support Unloading an assembly; It seems same to MS COM.