The Microsoft Office Picture Manager is an image editing and management application that comes with Microsoft Office. It integrates with SharePoint Picture Libraries, allowing you to upload images, edit images, and send images into other Office Applications.
The application uses the sharepoint imaging.asmx web service in SharePoint 2010 to access files. When using the "Send To" command in a Picture Library it will use CheckSubwebAndList, GetItemsByIds, and Download operations to retrieve the image.
The Picture Library uses the IMGLIB.js javascript file. Clicking "Send To" fires off the SendImages() function, which then fires off _SendImages() follwed by SendImagesCore() and finally StartOIS(). Together these functions find the images and library, verify that IE is being used, then kick off the ois.exe application using the OISCTRL.OISClientLauncher Active X Control with the sendto parameter.
Because of the use of the imaging.asmx web service, a Picture Library is required for SharePoint integration with the Microsoft Office Picture Manager.