1,vc中右键点击一个类或宏，可以察看他的定义，但如何返回初始地方呢？
install visual assist, and use Alt+left arrow
按菜单中的后退 (<- 转４５度)按钮
好像是又打开了一个文档,关闭它就行了
2,怎样获取系统菜单,并且弹出系统菜单？
void CTestsysmenuDlg::OnOK() { // click the OK button to show system menu(masterz) POINT curPos; GetCursorPos(&curPos); SetForegroundWindow(); CMenu* pMenu=GetSystemMenu(false); int nSelection=pMenu->TrackPopupMenu(TPM_LEFTBUTTON | TPM_LEFTALIGN | TPM_BOTTOMALIGN|TPM_NONOTIFY|TPM_RETURNCMD, curPos.x, curPos.y, this); DWORD dwpos= curPos.x + ((curPos.y<<16)&0xffff0000); SendMessage(WM_SYSCOMMAND,nSelection,dwpos); CString msg; msg.Format("x:%d,y:%d; cursor.x=%d,cursor.y=%d",LOWORD(dwpos),HIWORD(dwpos),curPos.x,curPos.y); OutputDebugString(msg); }
3, 如何控制键盘上面的3 个灯的亮灭（NUM LOCK ,CAPS LOCK SRCOLL LOCK)
#include <windows.h> void SetNumLock( BOOL bState ) { BYTE keyState[256]; GetKeyboardState((LPBYTE)&keyState); if( (bState && !(keyState[VK_NUMLOCK] & 1)) || (!bState && (keyState[VK_NUMLOCK] & 1)) ) { // Simulate a key press keybd_event( VK_NUMLOCK, 0x45, KEYEVENTF_EXTENDEDKEY | 0, 0 ); // Simulate a key release keybd_event( VK_NUMLOCK, 0x45, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0); } } void main() { SetNumLock( TRUE ); }
4, 已经在VC的AppWizard中选择了中文后如何改为英文？
以某文件编辑器打开资源文件，在其中查找"Language"，找到后可看到入下所示：
//Chinese (P.R.C) resources #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_CHS) #ifdef _WIN32 LANGUAGE LANG_CHINESE,SUBLANG_CHINESE_SIMPLIFIED #pragma code_page(936) #endif //_WIN32
这段代码表示当前使用的代码页为936，所代表的语种为简体中文，将以下代码用如下代码替换：
//English (U.S) resources #if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU) #ifdef _WIN32 LANGUAGE LANG_ENGLISH,SUBLANG_ENGLISH_US #pragma code_page(1252) #endif //_WIN32
5,如何有效地判断鼠标点是否在控件的矩形区域内
DWORD dw = GetMessagePos(); CPoint pt(LOWORD(dw),HIWORD(dw));//鼠标的屏幕坐标 CRect r; GetDlgItem(IDC_EDIT1)->GetClientRect(&r); GetDlgItem(IDC_EDIT1)->ClientToScreen(&r); if(r.PtInRect(pt)) AfxMessageBox("在控件内");
6,处理控件的右键,类向导上没有
BOOL CCDialogDlg::PreTranslateMessage(MSG* pMsg) { if(WM_MOUSEMOVE == pMsg->message) if(pMsg->hwnd == GetDlgItem(IDC_BUTTON1)->GetSafeHwnd()) { UINT nFlag = pMsg->wParam; // 状态,如ctrl是不按下 int xPos = LOWORD(pMsg->lParam); // horizontal position of cursor int yPos = HIWORD(pMsg->lParam); // vertical position of cursor } return CDialog::PreTranslateMessage(pMsg); }
