CLIENTCREATESTRUCT structure (winuser.h)

Contains information about the menu and first multiple-document interface (MDI) child window of an MDI client window. An application passes a pointer to this structure as the lpParam parameter of the CreateWindow function when creating an MDI client window.

Syntax

typedef struct tagCLIENTCREATESTRUCT {
  HANDLE hWindowMenu;
  UINT   idFirstChild;
} CLIENTCREATESTRUCT, *LPCLIENTCREATESTRUCT;

Members

hWindowMenu

Type: HANDLE

A handle to the MDI application's window menu. An MDI application can retrieve this handle from the menu of the MDI frame window by using the GetSubMenu function.

idFirstChild

Type: UINT

The child window identifier of the first MDI child window created. The system increments the identifier for each additional MDI child window the application creates, and reassigns identifiers when the application destroys a window to keep the range of identifiers contiguous. These identifiers are used in WM_COMMAND messages sent to the application's MDI frame window when a child window is chosen from the window menu; they should not conflict with any other command identifiers.

Remarks

When the MDI client window is created by calling CreateWindow, the system sends a WM_CREATE message to the window. The lParam parameter of WM_CREATE contains a pointer to a CREATESTRUCT structure. The lpCreateParams member of this structure contains a pointer to a CLIENTCREATESTRUCT structure.

Requirements

See also

About the Multiple Document Interface

Conceptual

CreateWindow

GetSubMenu

MDICREATESTRUCT

Reference

WM_COMMAND

Windows