uses ShellAPI;
...
// opens Windows Explorer with the file highlighted
ShellExecute(Handle,
'open',
'C:\Windows\explorer.exe',
'/start,"' + ImageFileName + '"',
nil,
SW_SHOWNORMAL);
// opens the default program associated with the type (extension) of the file,
// which in your case can very well be Windows Fax and Picture Viewer
ShellExecute(Handle,
'open',
nil,
'"' + ImageFileName + '"',
nil,
SW_SHOWNORMAL);
Если ImageFileName
уже содержит "
, удалите их в коде выше.