Document.LeftMargin Property (Visio)
Specifies the left margin, which is used when printing. Read/write.
The LeftMargin property corresponds to the Left setting in the Print Setup dialog box (on the Design tab, click the Page Setup arrow, and then, on the Print Setup tab, click Setup).
You can specify UnitsNameOrCode as an integer or a string value. If the string is invalid, an error is generated. For example, the following statements all set UnitsNameOrCode to inches.
Document.LeftMargin (visInches) = newValue
Document.LeftMargin (65) = newValue
Document.LeftMargin ("in") = newValue where "in" can also be any of the alternate strings representing inches, such as "inch", "in.", or "i".
For a complete list of valid unit strings along with corresponding Automation constants (integer values), see About Units of Measure.
Automation constants for representing units are declared by the Microsoft Visio type library in member VisUnitCodes.