typedef enum ltmmDVD_WARNING
    {
        ltmmDVD_WARNING_InvalidDVD1_0Disc =1, 
        ltmmDVD_WARNING_FormatNotSupported =2, 
        ltmmDVD_WARNING_IllegalNavCommand =3, 
        ltmmDVD_WARNING_Open =4, 
        ltmmDVD_WARNING_Seek =5, 
        ltmmDVD_WARNING_Read =6
    } ltmmDVD_WARNING;
The ltmmDVD_WARNING constants specifiy the DVD warning conditions.
| Constant | Description | 
| ltmmDVD_WARNING_InvalidDVD1_0Disc | [1] DVD-Video disc is incorrectly authored. Playback can continue, but unexpected behavior may occur. | 
| ltmmDVD_WARNING_FormatNotSupported | [2] A decoder Also known as a decompressor Also known as a decoder, this is a module or algorithm to decompress data., this is a module or algorithm to decompress data. would not support the current format. Playback of a stream (audio, video of SP) may not function. lParam2 contains the stream type | 
| ltmmDVD_WARNING_IllegalNavCommand | [3] The internal DVD navigation command processor attempted to process an illegal command. | 
| ltmmDVD_WARNING_Open | [4] File Open Failed. | 
| ltmmDVD_WARNING_Seek | [5] File Seek Failed | 
| ltmmDVD_WARNING_Read | [6] File Read Failed. | 
Comments
For more detailed information, see the Microsoft documentation for the DVD_WARNING Enumeration.