If i understand you well, you want to open folder in windows explorer and select specific file.
Dim sFileName As String = "C:\Images\Test.png"
Process.Start("explorer.exe", "/select," & sFileName)
As is shown here
] there's few arguments you can pass to the explorer:
|/e || |
|/idlist,:handle:process ||specifies object as ITEMIDLIST in shared memory block with given |
handle in context of given process
|/n ||redundant in Windows Vista |
|specifies object as root |
|/select ||show object as selected item in parent folder |
|/separate ||show in separate EXPLORER process |
|path ||specifies object; |
ignored if object already specified;
overridden by specification in later /idlist or /root argument