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

See Also

CreateToolhelp32Snapshot

Process Walking

Process32Next

PROCESSENTRY32

Tool Help Functions

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Build date: 7/2/2009