windows核心编程 学习笔记1

#include "CmnHdr.h"#include "Resource.h"#include <Windowsx.h>#define ESM_POKECODEANDLOOKUP WM_USER+100int WINAPI _tWinMain(HINSTANCE hinstance,HINSTANCE,PTSTR lpcmdline,int)//参数1 当前应用程序实例句柄 参数2 应用程序父窗口句柄，参数3 应用程序参数 参数4 窗口显示方式{HWND hwnd = FindWindow(TEXT("#32770"),TEXT("error show"));if(IsWindow(hwnd))SendMessage(hwnd,ESM_POKECODEANDLOOKUP,__ttoi(lpcmdline),0);elseDialogBoxParam(hinstance,MAKEINTRESOURCE(IDD_ERRORSHOW),NULL,Dlg_Proc,_ttoi(lpcmdline));//该函数根据对话框模板资源创建一个模态的对话框。}INT_PTR WINAPI Dlg_Proc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam){ switch (msg) {  chHANDLE_DLGMSG(hwnd,WM_INITDIALOG,Dlg_OnInitDialog);  chHANDLE_DLGMSG(hwnd,WM_COMMAND,Dlg_OnCommand); case ESM_POKECODEANDLOOKUP: SetDlgItemInt(hwnd,IDC_ERRORCODE,(UINT)wparam,FALSE); FORWARD_WM_COMMAND(hwnd,IDOK,GetDlgItem(hwnd,IDOK),BN_CLICKED,PostMessage); SetForegroundWindow(hwnd);//激活窗口，并创建指定线程设置到前台 break; }}BOOL Dlg_OnInitDialog(HWND hwnd,HWND hwndFocus,LPARAM lparam){ chSETDLGICONS(hwnd,IDI_ERRORSHOW); Edit_LimitText(GetDlgItem(hwnd,IDC_ERRORCODE),5);//限制5位数据 SendMessage(hwnd,ESM_POKECODEANDLOOKUP,lparam,0);//发送消息 return TRUE;}void Dlg_OnCommand(HWND hwnd,int id,HWND hwndctrl,UINT codeNotify){switch(id){case IDCANCEL:EndDialog(hwnd,id);break;case IDC_ALWAYSONTOP:SetWindowPos(hwnd,IsDlgButtonChecked(hwnd,IDC_ALWAYSONTOP)?HWND_TOPMOST:HWND_NOTOPMOST,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE);break;case IDC_ERRORCODE:EnableWindow(GetDlgItem(hwnd,IDOK),Edit_GetTextLength(hwndctrl)>0)case IDOK:DWORD dwError = GetDlgItemInt(hwnd,IDC_ERRORCODE,NULL,FALSE);HLOCAL hlocal = NULL;DWORD systetmlocale = MAKELANGID(LANG_NEUTRAL,SUBLANG_NEUTRAL);//从一个主语言标示符和从语言标示符创建一个语言标示符BOOL fOk = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS |FORMAT_MESSAGE_ALLOCATE_BUFFER, NULL, dwError, systetmlocale, (PTSTR) &hlocal, 0, NULL);if (!fOk) {// Is it a network-related error?HMODULE hDll = LoadLibraryEx(TEXT("netmsg.dll"), NULL, DONT_RESOLVE_DLL_REFERENCES);//从dll中检查错误代码if (hDll != NULL) {fOk = FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_IGNORE_INSERTS |FORMAT_MESSAGE_ALLOCATE_BUFFER,hDll, dwError, systemLocale,(PTSTR) &hlocal, 0, NULL);FreeLibrary(hDll);//如果有的调用formatmessage}}if (fOk && (hlocal != NULL)) {SetDlgItemText(hwnd, IDC_ERRORTEXT, (PCTSTR) LocalLock(hlocal));LocalFree(hlocal);} else {SetDlgItemText(hwnd, IDC_ERRORTEXT, TEXT("No text found for this error number."));}break;}}}