C++ 调整 MFC 窗口的大小
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Sizing an MFC Window
提问by Konrad
I have an MFC app which I have been working on for a few weeks now, I want to manually set the dimensions of the main frame when it is loaded, can someone give me a hand with this, specifically where to put the code as well?
我有一个 MFC 应用程序，我已经开发了几个星期，我想在加载时手动设置主框架的尺寸，有人可以帮我解决这个问题，特别是代码放在哪里?
Thanks!
谢谢！
回答by Roel
You can also set the size (with SetWindowPos()) from within CMainFrame::OnCreate(), or in the CWinApp-derived class' InitInstance. Look for the line that says pMainFrame->ShowWindow(), and call pMainFrame->SetWindowPos()before that line. That's where I always do it.
您还可以SetWindowPos()从 内部CMainFrame::OnCreate()或 -CWinApp派生类' 中设置大小（使用）InitInstance。查找显示pMainFrame->ShowWindow()，并pMainFrame->SetWindowPos()在该行之前调用的行。这就是我总是这样做的地方。
回答by IanW
Find your screen size with ..
使用 .. 找到您的屏幕尺寸
CRect rect;
SystemParametersInfo(SPI_GETWORKAREA,0,&rect,0);
screen_x_size=rect.Width();
screen_y_size=rect.Height();
use these values to calculate the X and Y size of your window then ..
使用这些值来计算窗口的 X 和 Y 大小，然后..
::SetWindowPos(m_hWnd,HWND_TOPMOST,0,0,main_x_size,main_y_size,SWP_NOZORDER);
Where main_x_sizeand main_y_sizeare your sizes.
凡main_x_size和main_y_size是你的尺寸。
回答by Serge
I think you're looking for PreCreateWindowand that your app isn't dialog based.
我认为您正在寻找PreCreateWindow并且您的应用程序不是基于对话框的。
It's a virtual member function of CWnd class and it's called by framework just before a window is created. So it's a right place to place your changes.
它是 CWnd 类的虚拟成员函数，在创建窗口之前由框架调用。因此，这是放置更改的正确位置。
You should write something like this:
你应该这样写：
BOOL CMyWindow::PreCreateWindow(CREATESTRUCT& cs)
{
cs.cy = 640; // width
cs.cx = 480; // height
cs.y = 0; // top position
cs.x = 0; // left position
// don't forget to call base class version, suppose you derived you window from CWnd
return CWnd::PreCreateWindow(cs);
}