Supported Windows API Functions

This section contains a list of supported Windows API functions.

NOTE: RTX64 only supports absolute pathnames.

Windows Function Name	Description
AbnormalTermination	Indicates whether the try block of a try-finally statement terminated normally. The function can be called only from within the finally block of a try-finally statement.
CloseHandle	Closes an open object handle.
CreateDirectory	Creates a new directory. If the underlying file system supports security on files and directories, the function applies a specified security descriptor to the new directory.
CreateFile	Creates or opens a file. It then returns a handle that can be used to access the object.
CreateThread	Creates a thread to execute within the address space of the calling process.
DeleteCriticalSection	Releases all resources used by an unowned critical-section object.
DeleteFile	Deletes an existing file.
DeviceIoControl	Sends a control code directly to a specified device driver, causing the corresponding device to perform the specified operation.
DllMain	An optional method of entry into a dynamic-link library (DLL).
EnterCriticalSection	Waits for ownership of the specified critical-section object. The function returns when the calling thread is granted ownership.
ExitProcess	Ends a process and all its threads.
ExitThread	Ends a thread.
FileTimeToLocalFileTime	Converts a file time to a local file time.
FileTimeToSystemTime	Converts a 64-bit file time to system time format.
FreeLibrary	Decrements the reference count of the loaded dynamic-link library (DLL) module.
GetCurrentProcess	Returns a pseudo handle for the current process.
GetCurrentProcessId	Returns the process identifier of the calling process.
GetCurrentProcessorNumber	Returns the system-assigned number of the current processor on which the caller is running.
GetCurrentThread	Returns a pseudohandle for the current thread.
GetCurrentThreadId	Returns the thread identifier of the calling thread.
GetExceptionCode	Retrieves a code that identifies the type of exception that occurred.
GetExceptionInformation	Retrieves a machine-independent description of an exception, and information about the machine state that existed for the thread when the exception occurred.
GetExitCodeThread	Retrieves the termination status of the specified thread.
GetModuleFileName	Retrieves a handle for each module in a specified process.
GetModuleHandle	Retrieves a module handle for the specified module. The module must have been loaded by the calling process.
GetModuleHandleEx	Retrieves a module handle for the specified module in a specified process.
GetLastError	Returns the calling thread's last-error code value.
GetLocalTime	Retrieves the current local date and time.
GetProcAddress	Returns the address of the specified exported dynamic-link library (DLL) function.
GetProcessAffinityMask	Retrieves the process affinity mask for the specified process and the system affinity mask for Real-Time Subsystem (RTSS).
GetProcessHeap	Obtains a handle to the heap of the calling process. This handle can then be used in calls to HeapAlloc, HeapReAlloc, HeapFree, and HeapSize.
GetSystemTime	Retrieves the current system date and time. The system time is expressed in Coordinated Universal Time (UTC).
GetTimeZoneInformation	Retrieves the current time-zone parameters. These parameters control the translations between UTC and local time.
HeapAlloc	Allocates a block of memory from a heap. The allocated memory is not movable.
HeapCreate	Creates a heap object that can be used by the calling process.
HeapDestroy	Destroys the specified heap object.
HeapFree	Frees a memory block allocated from a heap by HeapAlloc or HeapReAlloc.
HeapReAlloc	Reallocates a block of memory from a heap. This function enables you to resize a memory block and change other memory block properties.
HeapSize	Returns the size, in bytes, of a memory block allocated from a heap by HeapAlloc or HeapReAlloc.
InitializeCriticalSection	Initialize a Critical Section object.
InterlockedAdd	Performs an atomic addition operation on the specified LONG values.
InterlockedAdd64	Performs an atomic addition operation on the specified LONGLONG values.
InterlockedAnd	Performs an atomic AND operation on the specified LONG values.
InterlockedAnd8	Performs an atomic AND operation on the specified char values.
InterlockedAnd16	Performs an atomic AND operation on the specified SHORT values.
InterlockedAnd64	Performs an atomic AND operation on the specified LONGLONG values.
InterlockedBitTestAndReset	Tests the specified bit of the specified LONG value and sets it to 0. The operation is atomic.
InterlockedBitTestAndSet	Tests the specified bit of the specified LONG value and sets it to 1. The operation is atomic.
InterlockedCompare64Exchange128	Performs an atomic compare-and-exchange operation on the specified values. The function compares the specified 64-bit values and exchanges with the specified 128-bit value based on the outcome of the comparison. The operation is performed with release memory ordering semantics.
InterlockedCompareExchange	Performs an atomic compare-and-exchange operation on the specified values.
InterlockedCompareExchange16	Performs an atomic compare-and-exchange operation on the specified values. The function compares two specified 16-bit values and exchanges with another 16-bit value based on the outcome of the comparison.
InterlockedCompareExchange64	Performs an atomic compare-and-exchange operation on the specified values. The function compares two specified 64-bit values and exchanges with another 64-bit value based on the outcome of the comparison.
InterlockedCompareExchange128	Performs an atomic compare-and-exchange operation on the specified values. The function compares two specified 128-bit values and exchanges with another 128-bit value based on the outcome of the comparison.
InterlockedCompareExchangePointer	Performs an atomic compare-and-exchange operation on the specified values. The function compares two specified pointer values and exchanges with another pointer value based on the outcome of the comparison.
InterlockedDecrement	Decrements (decreases by one) the value of the specified 32-bit variable as an atomic operation.
InterlockedDecrement16	Decrements (decreases by one) the value of the specified 16-bit variable as an atomic operation.
InterlockedDecrement64	Decrements (decreases by one) the value of the specified 64-bit variable as an atomic operation.
InterlockedExchange	Sets a 32-bit variable to the specified value as an atomic operation.
InterlockedExchange8	Sets an 8-bit variable to the specified value as an atomic operation.
InterlockedExchange16	Sets a 16-bit variable to the specified value as an atomic operation.
InterlockedExchange64	Sets a 64-bit variable to the specified value as an atomic operation.
InterlockedExchangePointer	Atomically exchanges a pair of addresses.
InterlockedExchangeSubtract	Performs an atomic subtraction of two values.
InterlockedExchangeAdd	Performs an atomic addition of two 32-bit values.
InterlockedExchangeAdd64	Performs an atomic addition of two 64-bit values.
InterlockedIncrement	Increments (increases by one) the value of the specified 32-bit variable as an atomic operation.
InterlockedIncrement16	Increments (increases by one) the value of the specified 16-bit variable as an atomic operation.
InterlockedIncrement64	Increments (increases by one) the value of the specified 64-bit variable as an atomic operation.
InterlockedOr	Performs an atomic OR operation on the specified LONG values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedOr8	Performs an atomic OR operation on the specified char values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedOr16	Performs an atomic OR operation on the specified SHORT values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedOr64	Performs an atomic OR operation on the specified LONGLONG values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedXor	Performs an atomic XOR operation on the specified LONG values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedXor8	Performs an atomic XOR operation on the specified char values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedXor16	Performs an atomic XOR operation on the specified SHORT values. The function prevents more than one thread from using the same variable simultaneously.
InterlockedXor64	Performs an atomic XOR operation on the specified LONGLONG values. The function prevents more than one thread from using the same variable simultaneously.
LeaveCriticalSection	Releases ownership of the specified critical-section object.
LoadLibrary	Maps the specified executable module into the address space of the calling process.
LocalFileTimeToFileTime	Converts a local file time to a file time based on the UTC.
OutputDebugString	If the application has a debugger, the debugger displays the string. If the application has no debugger, OutputDebugString does nothing.
QueryPerformanceCounter	Retrieves the current value of the high-resolution performance counter.
QueryPerformanceFrequency	Retrieves the frequency of the high-resolution performance counter, if one exists. The frequency cannot change while the system is running.
RaiseException	Raises an exception in the calling thread.
ReadFile	Reads data from a file, starting at the position indicated by the file pointer.
RegCloseKey	A handle to the specified registry key.
RegCreateKey	Creates the specified registry key.
RegCreateKeyEx	Creates the specified registry key.
RegDeleteKey	Deletes a subkey and its values. See the RegDeleteKeyEx function for more expanded options.
RegDeleteKeyEx	Deletes a subkey and its values from the registry. See RegDeleteKey for a basic version of this function.
RegDeleteValue	Removes the specified value from the specified registry key.
RegEnumKey	Enumerates the subkeys of the specified open registry key.
RegEnumKeyEx	The subkeys of the specified open registry key.
RegEnumValue	Enumerates the values for the specified open registry key.
RegOpenKey	Opens the specified registry key.
RegOpenKeyEx	Opens the specified registry key.
RegQueryValueEx	Retrieves the type and data associated with the value of a specified registry key.
RegSetValueEx	Sets the data for the specified value in the specified registry key.
RemoveDirectory	Deletes an existing empty directory.
ResumeThread	Subtracts one from a thread's suspend count.
SetEndOfFile	Function moves the end-of-file (EOF) position for the specified file to the current position of the file pointer.
SetFilePointer	Moves the file pointer of an open file.
SetLastError	Sets the last-error code for the calling thread.
SetProcessAffinityMask	Sets a processor affinity mask for the threads of the specified process.
SetThreadAffinityMask	Sets a processor affinity mask for the specified thread.
SetThreadIdealProcessor	Sets a preferred processor for a thread.
SetUnhandledExceptionFilter	Lets an application supersede the top-level exception handler that RTSS places at the top of each thread and process.
Sleep	Suspends the current process for the specified time.
SleepEx	Suspends the current thread until the specified condition is met.
SuspendThread	Suspends the specified thread.
SystemTimeToFileTime	Converts a system time to a file time.
TerminateThread	Terminates a thread.
TlsAlloc	Allocates a thread local storage (TLS) index.
TlsFree	Releases a thread local storage (TLS) index, making it available for reuse.
TlsGetValue	Retrieves the value in the calling thread's thread local storage (TLS) slot for a specified TLS index.
TlsSetValue	Stores a value in the calling thread's thread local storage (TLS) slot for a specified TLS index.
TryEnterCriticalSection	Attempts to enter a critical section without blocking. If the call is successful, the calling thread takes ownership of the critical section.
UnhandledExceptionFilter	Displays an Application Error message box and causes the exception handler to be executed.
VirtualAlloc	Allocates memory in the RTX64 virtual address space. Memory allocated by this function is uninitialized.
VirtualFree	Frees memory allocated with VirtualAlloc.
WaitForMultipleObjects	Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
WaitForSingleObject	Waits until the specified object is in the signaled state or the time-out interval elapses.
WaitForSingleObjectEx	Waits until the specified object is in the signaled state or the time-out interval elapses.
WriteFile	Writes data to a file (synchronous operations only).