16,551
社区成员
发帖
与我相关
我的任务
分享关于createwindow
msdn中对
HWND CreateWindow(
LPCTSTR lpClassName, // registered class name
LPCTSTR lpWindowName, // window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle to parent or owner window
HMENU hMenu, // menu handle or child identifier
HINSTANCE hInstance, // handle to application instance
LPVOID lpParam // window-creation data
);
中nWidth参数的解释为
nWidth
[in] Specifies the width, in device units, of the window. For overlapped windows, nWidth is either the window's width, in screen coordinates, or CW_USEDEFAULT. If nWidth is CW_USEDEFAULT, the system selects a default width and height for the window; the default width extends from the initial x-coordinate to the right edge of the screen, and the default height extends from the initial y-coordinate to the top of the icon area. CW_USEDEFAULT is valid only for overlapped windows; if CW_USEDEFAULT is specified for a pop-up or child window, nWidth and nHeight are set to zero.
看了老半天，就是没看懂（the default width extends from the initial x-coordinate to the right edge of the screen, and the default height extends from the initial y-coordinate to the top of the icon area.）这句话中的 default width 和 default height到底是指的从哪儿到哪儿的宽度，可否有人解释一下?
HWND CreateWindow(
LPCTSTR lpClassName, // registered class name
LPCTSTR lpWindowName, // window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle to parent or owner window
HMENU hMenu, // menu handle or child identifier
HINSTANCE hInstance, // handle to application instance
LPVOID lpParam // window-creation data
);
中nWidth参数的解释为
nWidth
[in] Specifies the width, in device units, of the window. For overlapped windows, nWidth is either the window's width, in screen coordinates, or CW_USEDEFAULT. If nWidth is CW_USEDEFAULT, the system selects a default width and height for the window; the default width extends from the initial x-coordinate to the right edge of the screen, and the default height extends from the initial y-coordinate to the top of the icon area. CW_USEDEFAULT is valid only for overlapped windows; if CW_USEDEFAULT is specified for a pop-up or child window, nWidth and nHeight are set to zero.
看了老半天，就是没看懂（the default width extends from the initial x-coordinate to the right edge of the screen, and the default height extends from the initial y-coordinate to the top of the icon area.）这句话中的 default width 和 default height到底是指的从哪儿到哪儿的宽度，可否有人解释一下?
...全文
请发表友善的回复…
发表回复
ming6424 2005-09-19
- 打赏
- 举报
注释着「initial x position」和「initial y position」的参数指定了窗口左上角相对于屏幕左上角的初始位置。由于这些参数使用CW_USEDEFAULT标识符，指示Windows使用重迭窗口的内定位置。（CW_USEDEFAULT定义为0x80000000。）内定情况下，Windows依次对新建立的窗口定位，使各窗口左上角的垂直和水平距离在屏幕上按一定的大小递增。与此类似，注释着「initial x size」和「initial y size」的参数分别指定窗口的宽度和高度。同样使用了CW_USEDEFAULT标识符，表明希望Windows使用内定尺寸。
