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Returns a value that indicates whether a user variable is added to a model.
Assembly: Microsoft.Solver.Foundation (in Microsoft.Solver.Foundation.dll)
'Declaration Function AddVariable ( _ key As Object, _ <OutAttribute> ByRef vid As Integer _ ) As Boolean
Return ValueType: System.Boolean
true if the user variable is added to the model successfully; false if the model already includes a user variable that is referenced by key or if the model already includes a row that is referenced by key.
The following table shows the value of vid, depending on the key.
key in the model
Value of vid
The model already includes a user variable that is referenced by key.
vid is set to the variable index.
The model already includes a row that is referenced by key.
vid is set to -1.
A new variable that is associated with key is added to the model.
vid is set to the new variable index.
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.