EnumDPCallback

BOOL WINAPI EnumDPCallback(LPGUID lpguidSP,

LPSTR/LPWSTR lpSPName, DWORD dwMajorVersion,

DWORD dwMinorVersion, LPVOID lpContext);

Application-defined callback function for the DirectPlayEnumerate function. Depending on whether UNICODE is defined or not, the prototype for the callback function will have lpSPName defined as either the LPWSTR type (for Unicode) or the LPSTR type (for ANSI).

·Returns TRUE to continue the enumeration or FALSE to stop it.

lpguidSP

Address of the unique identifier of the DirectPlay service provider.

lpSPName

Address of a string containing the driver description. Depending on whether the UNICODE symbol is defined or not, the parameter will be of the LPWSTR type (Unicode) or the LPSTR type (ANSI).

dwMajorVersion and dwMinorVersion

Major and minor version numbers of the driver.

lpContext

Address of an application-defined context.

Any pointers returned in a callback function are temporary and are valid only in the body of the callback function. If the application needs to save pointer information, it must allocate memory to hold the data, copy the data, and then store the pointer to this new data. In this function, lpguidSP and lpSPName are temporary.