CWPSTRUCT structure (winuser.h)

Defines the message parameters passed to a WH_CALLWNDPROC hook procedure, CallWindowProcW function/CallWindowProcA function.

Syntax

typedef struct tagCWPSTRUCT {
  LPARAM lParam;
  WPARAM wParam;
  UINT   message;
  HWND   hwnd;
} CWPSTRUCT, *PCWPSTRUCT, *NPCWPSTRUCT, *LPCWPSTRUCT;

Members

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 to receive the message.

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

Hooks

SetWindowsHookEx