With this flag you can adjust, if Windows Shell error messages, e.g. about inaccessible or unavailable folders or files, will be shown to the user or not.

TJamShellTree.Colorcompressed 

TJamShellTree.ColorEncrypted 

TJamShellTree.ShowHidden 

TJamShellTree.ShowFiles 

TJamShellTree.ShowNetHood 

TJamShellTree.ShowRecycleBin

ShellControls.TJamShellTree