CMediaType::IsValid
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4/8/2010
Queries whether the object has a valid major type.
Syntax
BOOL IsValid( ) const;
Parameters
None.
Return Value
Returns one of the following values.
| Value | Description |
|---|---|
TRUE |
CMediaType object has a valid major type. |
FALSE |
CMediaType object does not have a valid major type. |
Remarks
When CMediaType objects are constructed, their GUIDs are initialized with GUID_NULL (unless they are constructed based on another AM_MEDIA_TYPE structure or CMediaType object).
This member function is useful for discovering if the object has been correctly initialized.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |