GetClientRect这个值等于多少

[longren16698]

在一个应用窗口中GetClientRect这个函数的值到底等于多少.

[辉歌]

CWnd::GetClientRect

This method copies the client coordinates of the CWnd client area into the structure pointed to by lpRect. The client coordinates specify the upper-left and lower-right corners of the client area. Since client coordinates are relative to the upper-left corners of the CWnd client area, the coordinates of the upper-left corner are (0,0).
void GetClientRect( LPRECT lpRect ) const;
Parameters
lpRect
Points to a RECT structure or a CRect object to receive the client coordinates. The left and top members will be zero. The right and bottom members will contain the width and height of the window.
Example
This is the example from the CWnd::IsIconic method.

// This code, normally emitted by the AppWizard for a dialog-based
// project for the dialog's WM_PAINT handler, it runs only if the
// window is iconic. The window erases the icon's area, then
// paints the icon referenced by m_hIcon.

if (IsIconic())
{
CPaintDC dc(this); // Device context for painting.

IconEraseBkgnd(dc);

// Center the icon in client rectangle.
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;

// Draw the icon.
dc.DrawIcon(x, y, m_hIcon);
}

[fwsland]

得到的值是窗口的大小，即窗口的左上角为（0，0）点，它和GetWindowRect()很相似，但是他们有着本质的区别，应为GetWindowRect()得到的是相对于屏幕坐标而言的。

[cooljjyy]

窗口去掉title bar和边框以后的矩形大小，为(0,0,width,height)

[longren16698]

假如我添加了一些控件呢，实际上大小根本不是窗口去掉title bar和边框，控件以后的矩形大小.