ntddsysenv.h header
This is the include file that defines all constants and types for accessing the system variable device interface.
ntddsysenv.h contains the following programming interfaces:
IOCTLs
| IOCTL_SYSENV_ENUM_VARIABLES Returns information about system environment variables using SysEnv device. |
| IOCTL_SYSENV_GET_VARIABLE Gets the value of the specified system environment variables using SysEnv device. |
| IOCTL_SYSENV_QUERY_VARIABLE_INFO IOCTL_SYSENV_QUERY_VARIABLE_INFO returns information about system environment variables using SysEnv device. |
| IOCTL_SYSENV_SET_VARIABLE Sets the value of the specified system environment variables using SysEnv device. |
Structures
| SYSENV_VALUE Stores the value of a system environment variable using SysEnv device. This structure is used in the IOCTL_SYSENV_GET_VARIABLE request. |
| SYSENV_VARIABLE Stores the name a system environment variable using SysEnv device. This structure is used in the IOCTL_SYSENV_GET_VARIABLE request. |
| SYSENV_VARIABLE_INFO Stores the information about a system environment variable using SysEnv device. This structure is used in the IOCTL_SYSENV_QUERY_VARIABLE_INFO request. |
| XVARIABLE_NAME Stores the name of a system environment variable using SysEnv device. This structure is used in the IOCTL_SYSENV_ENUM_VARIABLES request. |
| XVARIABLE_NAME_AND_VALUE Stores the name and value of a system environment variable using SysEnv device. This structure is used in the IOCTL_SYSENV_ENUM_VARIABLES and IOCTL_SYSENV_SET_VARIABLE requests. |
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