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CWPRETSTRUCT structure (winuser.h)

  • Article

Defines the message parameters passed to a WH_CALLWNDPROCRET hook procedure, HOOKPROC callback function.

Syntax

typedef struct tagCWPRETSTRUCT {
  LRESULT lResult;
  LPARAM  lParam;
  WPARAM  wParam;
  UINT    message;
  HWND    hwnd;
} CWPRETSTRUCT, *PCWPRETSTRUCT, *NPCWPRETSTRUCT, *LPCWPRETSTRUCT;

Members

lResult

Type: LRESULT

The return value of the window procedure that processed the message specified by the message value.

lParam

Type: LPARAM

Additional information about the message. The exact meaning depends on the message value.

wParam

Type: WPARAM

Additional information about the message. The exact meaning depends on the message value.

message

Type: UINT

The message.

hwnd

Type: HWND

A handle to the window that processed the message specified by the message value.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Header winuser.h (include Windows.h)

See also

HOOKPROC

Conceptual

Hooks

Reference

SetWindowsHookEx