summary23 GetClientRect()、RECT Structure、CRect class

GetClientRect function

• 12/05/2018
• 2 minutes to read

Retrieves the coordinates of a window's client area. The client coordinates specify the upper-left and lower-right corners of the client area. Because client coordinates are relative to the upper-left corner of a window's client area, the coordinates of the upper-left corner are (0,0).

Syntax

C++Copy

BOOL GetClientRect(
  HWND   hWnd,
  LPRECT lpRect
);

Parameters

hWnd

Type: HWND

A handle to the window whose client coordinates are to be retrieved.

lpRect

Type: LPRECT

A pointer to a RECT structure that receives the client coordinates. The left and top members are zero. The right and bottom members contain the width and height of the window.

Return Value

Type: Type: BOOL

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

RECT structure

• 04/18/2018
• 2 minutes to read

The RECT structure defines the coordinates of the upper-left and lower-right corners of a rectangle.

Syntax

c++Copy

typedef struct _RECT {
  LONG left;
  LONG top;
  LONG right;
  LONG bottom;
} RECT, *PRECT;

Members

• left
  The x-coordinate of the upper-left corner of the rectangle.

• top
  The y-coordinate of the upper-left corner of the rectangle.

• right
  The x-coordinate of the lower-right corner of the rectangle.

• bottom
  The y-coordinate of the lower-right corner of the rectangle.

CRect class