1.设计和注册窗口
有了WinMain函数，根据创建Win32应用程序的步骤，接下来应该是设计窗口类和注册窗口类了。MFC已经为我们预定义了一些默认的标准窗口类，只需要选择所需的窗口类，然后注册就可以了。窗口类的注册是由AfxEndDeferRegisterClass函数完成的，该函数的定义位于WINCORE.CPP文件中。其定义代码较长，由于篇幅所限，在这里仅列出部分代码，如例3-10所示。
例3-10
| BOOL AFXAPI AfxEndDeferRegisterClass(LONG fToRegister) { …… // common initialization WNDCLASS wndcls; memset(&wndcls, 0, sizeof(WNDCLASS)); // start with NULL defaults ① wndcls.lpfnWndProc = DefWindowProc; wndcls.hInstance = AfxGetInstanceHandle(); wndcls.hCursor = afxData.hcurArrow; …… // work to register classes as specified by fToRegister, populate fRegisteredClasses as we go if (fToRegister & AFX_WND_REG) { // Child windows - no brush, no icon, safest default class styles wndcls.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW; wndcls.lpszClassName = _afxWnd; if (AfxRegisterClass(&wndcls)) fRegisteredClasses |= AFX_WND_REG; } if (fToRegister & AFX_WNDOLECONTROL_REG) { // OLE Control windows - use parent DC for speed wndcls.style |= CS_PARENTDC | CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW; wndcls.lpszClassName = _afxWndOleControl; if (AfxRegisterClass(&wndcls)) fRegisteredClasses |= AFX_WNDOLECONTROL_REG; } …… if (fToRegister & AFX_WNDMDIFRAME_REG) { // MDI Frame window (also used for splitter window) wndcls.style = CS_DBLCLKS; wndcls.hbrBackground = NULL; if (_AfxRegisterWithIcon(&wndcls, _afxWndMDIFrame, AFX_IDI_STD_ MDIFRAME)) fRegisteredClasses |= AFX_WNDMDIFRAME_REG; } if (fToRegister & AFX_WNDFRAMEORVIEW_REG) { // SDI Frame or MDI Child windows or views - normal colors wndcls.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW; wndcls.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1); if (_AfxRegisterWithIcon(&wndcls, _afxWndFrameOrView, AFX_IDI_STD _FRAME)) fRegisteredClasses |= AFX_WNDFRAMEORVIEW_REG; } …… } |