Window C
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/*============================================================================ Name : Exercise.cpp Author : Haier Version : 1.01 Copyright : Copyright (c) 2014 Description : Exercise in C, Ansi-style, Compile by Code:Block ============================================================================*/#include <windows.h>#include <tchar.h>#if !defined LR_SHARED#define LR_SHARED 0x00008000#endifenum{ #if defined IDC_STATIC #undef IDC_STATIC #endif // defined IDC_STATIC=-1, IDC_ERRNUM=100, IDC_BTNGO, IDC_ERRMSG, IDM_HELP=40000, IDM_ABOUT};/*===========================================================================*/LRESULT CALLBACK WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam);HACCEL BuildAccelTable(void);void CentreWnd(HWND hwnd);BOOL CALLBACK SetChildFonts(HWND hChild,LPARAM lParam);void ShowErrMsg(HWND hEdit,int errnum);void AddSysMenu(HWND hwnd);void ShowAboutBox(HWND hParent);void ShowHelpBox(HWND hParent);/*===========================================================================*/int WINAPI WinMain(HINSTANCE hInst,HINSTANCE hPrev,LPSTR pStr,int nCmd){ HWND hwnd; MSG msg; TCHAR classname[]=_T("kenf's_wnd"); WNDCLASSEX wcx={0}; wcx.cbSize =sizeof(wcx); wcx.lpfnWndProc =WndProc; wcx.hInstance =hInst; wcx.hIcon =(HICON)LoadImage(0,IDI_INFORMATION,IMAGE_ICON,0,0,LR_SHARED); wcx.hCursor =(HCURSOR)LoadImage(0,IDC_ARROW,IMAGE_CURSOR,0,0,LR_SHARED); wcx.hbrBackground=(HBRUSH)(COLOR_BTNFACE+1); wcx.lpszClassName=classname; if(RegisterClassEx(&wcx)) { hwnd=CreateWindowEx(0,classname,_T("Error Message Tool"), WS_OVERLAPPEDWINDOW&~WS_MAXIMIZEBOX&~WS_THICKFRAME, 0, 0, 278, 178, 0,0,hInst,0); if(hwnd) { CentreWnd(hwnd); ShowWindow(hwnd,nCmd); UpdateWindow(hwnd); while(GetMessage(&msg,0,0,0)>0) { if(!TranslateAccelerator(hwnd,(HACCEL)GetWindowLongPtr(hwnd,GWL_USERDATA),&msg)) { if(!IsDialogMessage(hwnd,&msg)) { TranslateMessage(&msg); DispatchMessage(&msg); } } } return (int)msg.wParam; } else { MessageBox(0,_T("Wnd creation failure"),_T("Error"),MB_OK|MB_ICONERROR); return 0; } } MessageBox(0,_T("Wnd registration failure"),_T("Error"),MB_OK|MB_ICONERROR); return 0;}LRESULT CALLBACK WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam){ static HWND hEditNum,hBtnGo,hEditMsg; switch(uMsg) { case WM_CREATE: { SetWindowLongPtr(hwnd,GWL_USERDATA,(LONG_PTR)BuildAccelTable()); AddSysMenu(hwnd); hEditNum=CreateWindowEx(WS_EX_CLIENTEDGE,_T("edit"),_T("0"), WS_CHILD|WS_VISIBLE|ES_NUMBER|WS_TABSTOP, 56,8,138,28, hwnd,(HMENU)IDC_ERRNUM,GetModuleHandle(0),0); SendMessage(hEditNum,EM_SETLIMITTEXT,5,0); CreateWindowEx(0,_T("static"),_T("Value:"), WS_VISIBLE|WS_CHILD|SS_CENTERIMAGE, 8,8,48,28, hwnd,(HMENU)IDC_STATIC,GetModuleHandle(0),0); hBtnGo=CreateWindowEx(0,_T("button"),_T("Show"), WS_VISIBLE|WS_CHILD|WS_TABSTOP, 208,8,56,28, hwnd,(HMENU)IDC_BTNGO,GetModuleHandle(0),0); CreateWindowEx(0,_T("static"),_T("Message:"), WS_CHILD|WS_VISIBLE|SS_CENTERIMAGE, 8,42,48,28, hwnd,(HMENU)IDC_STATIC,GetModuleHandle(0),0); hEditMsg=CreateWindowEx(WS_EX_CLIENTEDGE,_T("edit"),0, WS_CHILD|WS_VISIBLE|ES_MULTILINE|ES_READONLY|WS_TABSTOP, 8,70,256,68, hwnd,(HMENU)IDC_ERRNUM,GetModuleHandle(0),0); EnumChildWindows(hwnd,SetChildFonts,0); SetFocus(hEditNum); SendMessage(hEditNum,EM_SETSEL,0,-1); return 0; } case WM_COMMAND: { WORD wID,wNotify; wID=LOWORD(wParam); wNotify=HIWORD(wParam); if(wNotify==BN_CLICKED) { switch(wID) { case IDCANCEL: { DestroyWindow(hwnd); return 0; } case IDOK: { } case IDC_BTNGO: { ShowErrMsg(hEditMsg,GetDlgItemInt(hwnd,IDC_ERRNUM,0,0)); return 0; } } } return 0; } case WM_DESTROY: { DestroyAcceleratorTable((HACCEL)GetWindowLongPtr(hwnd,GWL_USERDATA)); PostQuitMessage(0); return 0; } case WM_SYSCOMMAND: { UINT uCmd=(UINT)wParam; switch(uCmd) { case IDM_ABOUT: { ShowAboutBox(hwnd); return 0; } case IDM_HELP: { ShowHelpBox(hwnd); return 0; } return DefWindowProc(hwnd,uMsg,wParam,lParam); } } default: return DefWindowProc(hwnd,uMsg,wParam,lParam); }}/*===========================================================================*/void AddSysMenu(HWND hwnd){ HMENU hMenu; hMenu=GetSystemMenu(hwnd,0); AppendMenu(hMenu,MF_SEPARATOR,0,0); AppendMenu(hMenu,MF_STRING,IDM_HELP,_T("Help...")); AppendMenu(hMenu,MF_STRING,IDM_ABOUT,_T("About..."));}/*===========================================================================*/HACCEL BuildAccelTable(void){ ACCEL ac; ac.fVirt=FVIRTKEY; ac.key =VK_F1; ac.cmd =IDM_HELP; return CreateAcceleratorTable(&ac,1);}/*===========================================================================*/void CentreWnd(HWND hwnd){ RECT rc,rcDesk; SystemParametersInfo(SPI_GETWORKAREA,0,&rcDesk,0); GetWindowRect(hwnd,&rc); MoveWindow(hwnd,(rcDesk.right-rc.right+rc.left)/2, (rcDesk.bottom-rc.bottom+rc.top)/2, rc.right-rc.left, rc.bottom-rc.top,0);}/*===========================================================================*/BOOL CALLBACK SetChildFonts(HWND hChild,LPARAM lParam){ SendMessage(hChild,WM_SETFONT,(WPARAM)GetStockObject(DEFAULT_GUI_FONT), MAKELPARAM(1,0)); return TRUE;}/*===========================================================================*/void ShowAboutBox(HWND hParent){ HWND hFocus; int len; MSGBOXPARAMS mbp; TCHAR *txt; TCHAR ab[]=_T("Abot "); len=lstrlen(ab)+GetWindowTextLength(hParent)+1; if((txt=(TCHAR*)malloc(len*sizeof(TCHAR)))!=0) { lstrcpy(txt,ab); GetWindowText(hParent,&txt[lstrlen(ab)],len); } hFocus=GetFocus(); mbp.cbSize=sizeof(mbp); mbp.hwndOwner=hParent; mbp.hInstance=0; mbp.lpszText =_T("Copyright (c) 2004\n\nKen Fitlike"); if(txt) { mbp.lpszCaption=txt; } else { mbp.lpszCaption=ab; } mbp.dwStyle=MB_USERICON; mbp.lpszIcon=IDI_INFORMATION; mbp.dwContextHelpId=0; mbp.lpfnMsgBoxCallback=0; mbp.dwLanguageId=MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_UK); MessageBoxIndirect(&mbp); if(txt) { free(txt); } SetFocus(hFocus);}void ShowErrMsg(HWND hEdit,int errnum){ HWND hFocus; void *pMsg; hFocus=GetFocus(); if(FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM, 0, errnum, MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT), (LPTSTR)&pMsg, 0, NULL)==0) { MessageBox(0,_T("There is no message associated\n with that error code."), _T("Error"),MB_OK|MB_ICONEXCLAMATION); } else { SetWindowText(hEdit,(LPTSTR)pMsg); LocalFree(pMsg); } SetFocus(hFocus);}/*===========================================================================*/void ShowHelpBox(HWND hParent){ HWND hFocus; hFocus=GetFocus(); MessageBox(hParent, _T("F1\tHelp\nESC\tQuit\n\n") _T("Enter numerical error code in 'value' field\n") _T("and click the 'show' button to display any\n") _T("error message that corresponds to that value.\n"), _T("Help"), MB_OK); SetFocus(hFocus);} 0 0
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