CMediaType::IsValid

The IsValid method determines whether a major type has been assigned to this object.

Syntax

BOOL IsValid(void) const;

Return Value

Returns TRUE if a major type has been assigned to this object. Otherwise, returns FALSE.

Remarks

By default, CMediaType objects are initialized with a major type of GUID_NULL. Call this method to determine whether the object has been correctly initialized.

See Also

• CMediaType Class