OpenDeviceKey函数

DWORD XXX_Init(LPCTSTR RegistryPath, DWORD dwBusContect) { HKEY hKey; RETAILMSG( 1, (TEXT("XXX_Init/n"))); hKey = OpenDeviceKey(RegistryPath); if ( !hKey ) { RETAILMSG(1, (TEXT("Failed to open devkeypath,/r/n"))); } else { // Read values from registry if needed RegCloseKey (hKey); } return TRUE; }

xxx_Init由device.exe执行并传递参数，一般格式为xxx_Init(ULONG   Identifier)参数Identifier一般为字符串指针，例如"[HKEY_LOCAL_MACHINE/Drivers/Active/36]"
调用 OpenDeviceKey((LPCTSTR)Identifier);结果就是当前驱动程序的注册表路径。例如"[HKEY_LOCAL_MACHINE/Drivers/PCI/Instance/STRINGS1]"
调用DDKReg_GetIsrInfo 得到IRQ、SysIntr、IsrDll、IsrHandler、DeviceArrayIndex 调用DDKReg_GetWindowInfo得到IO端口的首地址和长度。