property Page.Left as Double
Specifies the left margin of the page, in inches coordinates.

TypeDescription
Double A double expression that indicates the width of the page's client area. The page's client area excludes the margins of the page.

Use the Left, Top, Height and Width properties to identify the client are of the printed page.  Use the PageHeight and PageWidth properties to get the page size including the margins.  In case you need the coordinates of the page's client are in pixels you should use the GetClipBox API function. The exPrint control sets the clipping area of the device context being the page's client area, before firing the DrawPage callback.