how to close windows photo viewer using matlab command?

• I opened a image using the command "winopen"
• Now my intention is to close the image using matlab commmand.
• I think "taskkil" may be help me but i don't know the exact application name for windows photo viewerI tried using

   !taskkill -f -im  PhotoViewer.exe

But it gives me the below error

ERROR: The process "PhotoViewer.exe" not found.

Answer 1

[Walter Roberson]

PhotoViewer does not have its own executable name; see http://www.sevenforums.com/software/180378-where-windows-photo-viewer-default-location.html

Answer 2

[KSSV]

doc close, fclose

[Walter Roberson]

Those are not relevant to something created using winopen(), which is roughly equivalent to double-clicking on the file in Windows Explorer.