Assigning material to all sub parts of big assembly with API?

Hi,

I have one big assembly which has houndreds of sub parts. 

Can I assign material which I select from combobox to all parts with VB.Net

I found some information below incase of set but could not find the way to fill material lists in to combobox?

 

https://help.solidworks.com/2022/English/api/sldworksapi/Set_Material_Example_VBNET.htm

 

 

 

 

Regards,

Mucip:)