RETERR DiInstallClass(LPCSTR lpszInfFileName, DWORD dwFlags)
Install the [ClassInstall] section of the specificed INF.
lpszInfFileName
The name of the INF file containing a [ClassInstall] section.
dwFlags
Flags to control the geninstall operation.
| DI_NOVCP | This flag should be specificed if a VCP queue is allready opened. | 
| DI_NOBROWSE | This flag should be specificed if no file browsing should be allowed in the event a copy operation cannot find a specificed file. | 
This API is generally called the the Device Manager when it installs a device of a new class.