Process32First function

Retrieves information about the first process encountered in a system snapshot.

Syntax


BOOL WINAPI Process32First(
  _In_     HANDLE hSnapshot,
  _Inout_  LPPROCESSENTRY32 lppe
);

Parameters

hSnapshot [in]

A handle to the snapshot returned from a previous call to the CreateToolhelp32Snapshot function.

lppe [in, out]

A pointer to a PROCESSENTRY32 structure. It contains process information such as the name of the executable file, the process identifier, and the process identifier of the parent process.

Return value

Returns TRUE if the first entry of the process list has been copied to the buffer or FALSE otherwise. The ERROR_NO_MORE_FILES error value is returned by the GetLastError function if no processes exist or the snapshot does not contain process information.

Remarks

The calling application must set the dwSize member of PROCESSENTRY32 to the size, in bytes, of the structure.

To retrieve information about other processes recorded in the same snapshot, use the Process32Next function.

Examples

For an example, see Taking a Snapshot and Viewing Processes.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

TlHelp32.h

Library

Kernel32.lib

DLL

Kernel32.dll

Unicode and ANSI names

Process32FirstW (Unicode) and Process32First (ANSI)

See also

CreateToolhelp32Snapshot
Process Walking
Process32Next
PROCESSENTRY32
Tool Help Functions

 

 

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