🚀 go-pugleaf

Mike Collins wrote:

>Hi all, can anyone point me in the right direction with this -not sure if it 
>is possible though.

Sounds COMplicated but doable.
(I haven't done it, just reading the docs...)

>I 'm using the SHBrowseForFolder api to display a browser dialog.  However, 
>i want to control what is displayed, and thus selected within this dialog. 
>I want to limit the users display to only removale drives, CD / DVD drives 
>and folders within these drives.  I've coded a custome callback for the 
>browser but i'm not sure what messages to look for and how to process then.

The remarks section here
http://msdn2.microsoft.com/en-us/library/ms647664.aspx
mentions  Custom Filtering (with 6 steps)

Step3
You will be catching BFFM_IUNKNOWN message in your callback
http://msdn2.microsoft.com/en-us/library/ms649522.aspx

    case BFFM_IUNKNOWN:
	IFolderFilterSite* FFS;
	((IUnknown*)lParam)->QueryInterface( Unsure, &FFS );

Step 5
Then making your COM filter interface available to the dialog.
http://msdn2.microsoft.com/en-us/library/ms645491.aspx

	FFS->SetFilter( MyIUnknownCOMInterfaceThatHasAnIFolderFilter);
Step 6
	FFS->Release();

Step 4
You would then need a COM Interface 
(MyIUnknownCOMInterfaceThatHasAnIFolderFilter) that returns a pointer
to an IFolderFilter which implements your 2 filtering procs.
http://msdn2.microsoft.com/en-us/library/ms645494.aspx

In particular your  IFolderFilter::ShouldShow() method returns S_OK to
show and S_FALSE to hide.
http://msdn2.microsoft.com/en-us/library/ms645496.aspx

Apparently after all that, the dialog automatically calls your COM
filters for each item.

COM interfaces are currently beyond my knowledge base.
Perhaps you have ventured there?