VarSub function (oleauto.h)

Subtracts two variants.

Syntax

HRESULT VarSub(
  [in]  LPVARIANT pvarLeft,
  [in]  LPVARIANT pvarRight,
  [out] LPVARIANT pvarResult
);

[in] pvarLeft

The first variant.

[in] pvarRight

The second variant.

[out] pvarResult

The result variant.

If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

The function operates as follows.

Condition	Result
Both expressions are strings	Subtraction
One expression is a string and the other a character	Subtraction
One expression is numeric and the other a string	Subtraction
Both expressions are numeric	Subtraction
Either expression is null	Null
Both expressions are empty	Empty string