Windows API Reference

System Functions

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System Functions

This section provides detailed documentation for Windows API functions related to system operations, including process management, service control, registry access, security, and system information retrieval.

Processes

Functions for creating, managing, and terminating processes.

Function Name Description
CreateProcess Creates a new process and its primary thread.
TerminateProcess Terminates the specified process.
OpenProcess Opens an existing process object.
GetProcessId Retrieves the process identifier of the calling process.

Services

Functions for managing Windows services.

Function Name Description
OpenSCManager Establishes a connection to the service control manager.
CreateService Creates a service entry in the specified service control manager database.
StartService Starts a specified service.
ControlService Sends a control code to a service.

Registry

Functions for accessing and manipulating the Windows Registry.

Function Name Description
RegOpenKeyEx Opens the specified key in the registry.
RegQueryValueEx Retrieves the type and data for a specified registry value.
RegSetValueEx Sets the data and extended information for a specified registry value.
RegCloseKey Closes an opened registry key.

Security

Functions related to security descriptors, access tokens, and permissions.

Function Name Description
GetSecurityInfo Retrieves security descriptor information for a specified object.
SetSecurityInfo Sets security descriptor information for a specified object.
OpenProcessToken Opens the access token associated with a process.

System Information

Functions for retrieving detailed information about the system.

Function Name Description
GetSystemInfo Fills the specified structure with information about the current system.
GetComputerName Retrieves the name of the computer.
GetUserName Retrieves the name of the user currently logged on to the local computer.
GlobalMemoryStatusEx Fills the MEMORYSTATUSEX structure with information about the current memory utilization for the computer.