i tried to create an app for office using visual studio 2013 i just created one in task pane with all default settings and then deployed succesffully and i can't find the app in task pane in word office

Hi Mohamed Abdeen,

Please try to enable a build-in app for Office, such as "Bing dictionary" and check if the task pane pop-up.

If the "Bing dictionary" works well, I suppose that this issue might be caused by itself. I recommend you post the question to Word for DEV forum:

https://social.msdn.microsoft.com/Forums/en-US/home?forum=worddev&filter=alltypes%2Calllanguages&sort=lastpostdesc

If all the apps can't be used, they might be blocked. Please go to File/option/trust center/trusted app catalogs/enable it.

Reference:

https://technet.microsoft.com/en-us/library/jj219429.aspx?f=255&MSPPError=-2147217396

https://msdn.microsoft.com/en-us/library/office/jj220060.aspx?f=255&MSPPError=-2147217396

Regards,

George Zhao
TechNet Community Support

the task pane is working and i think that the problem in the application but the problem that i only deployed the out of box solution and didn't customize any thing thanks