Page Size in the Common Scanner Dialog and in the Scanner and Camera Wizardīoth the Common Scanner Dialog and the Scanner and Camera Wizard have a static table of supported page sizes in which each page size is described by its horizontal width and vertical height, both in increments of 0.001 inch.
To communicate page size settings to a driver, an application must calculate the required size in dots per inch (dpi) and adjust the origin of the scan to conform with the registration requirements of the device. There are no WIA properties that allow WIA drivers to report supported page sizes or that allow applications to specify page size directly.
Although two WIA user interface components are able to display a list of page sizes to the user, there is no easy way for a WIA driver to know which page sizes a scanner supports.
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