CWPSTRUCT

The CWPSTRUCT structure defines the message parameters passed to a WH_CALLWNDPROC hook procedure, CallWndProc.

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

Members

lParam

Specifies additional information about the message. The exact meaning depends on the message value.

wParam

Specifies additional information about the message. The exact meaning depends on the message value.

message

Specifies the message.

hwnd

Handle to the window to receive the message.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Winuser.h; include Windows.h.

See Also

Hooks Overview, Hook Structures, CallWndProc, SetWindowsHookEx