VC reads the registry to obtain the installer

In Windows, the installer can be obtained in the Registry HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Uninstall, and XP, Vista, win7, and Win8 are the same.

Open the Registry command: regedit, and expand the above registry path in sequence. The list of installation programs is as follows:

 

Obtain the system installer list:

// Obtain the system installer list bool cmylistctrltestdlg: allregkey (hkey, lpctstr szdeskeyitem) {hkey hsubkey; DWORD dwindex = 0; long lresult; int I = 1; lresult = regopenkeyex (hkey, szdeskeyitem, 0, key_read, & hsubkey); // open the registry if (error_success = lresult) {tchar szkeyname [256] = {0 }; DWORD cbname = 256 * sizeof (tchar); lresult = regenumkeyex (hsubkey, dwindex, szkeyname, & cbname, 0, null); // get Field while (lresult = error_success & lresult! = Error_more_data) {outputdebugstring (szkeyname); cstring STR; Str. format (_ T ("% d"), I); I = m_mylist.insertitem (I, STR); // insert it to the list control to display m_mylist.setitemtext (I, 1, szkeyname ); dwindex = dwindex + 1; // change dwindex and obtain the cbname = 256 * sizeof (tchar); lresult = regenumkeyex (hsubkey, dwindex, szkeyname, & cbname, 0, null, null, null); I ++;} regclosekey (hsubkey); // disable registry return true;} regclosekey (hsubkey); Return false ;}

 
Get installer attributes(Read the registry twice ):

Bool softlist: allregkey (hkey, lpctstr szdeskeyitem) {hkey hsubkey; DWORD dwindex = 0; long lresult; lresult = Digest (hkey, szdeskeyitem, 0, key_read, & hsubkey ); // open the registry if (error_success = lresult) {int id = 1; // No. tchar s_name [256] = {0 }; // software name tchar s_displayname [256] = {0}; // display name tchar s_publisher [256] = {0}; // publisher tchar s_installdate [12] = {0 }; // installation date: DWORD s_estimatedsize; // tchar s_disp Layversion [256] = {0}; // DWORD cbname = 256 * sizeof (tchar); DWORD cbname2 = sizeof (tchar); DWORD typesz = REG_SZ; // SZ registry type DWORD typedword = REG_DWORD; // DWORD registry type lresult = regenumkeyex (hsubkey, dwindex, s_name, & cbname, 0, null, null ); // obtain the field while (lresult = error_success & lresult! = Error_more_data) {outputdebugstring (s_name); cstring STR; Str. format (_ T ("% d"), ID); Id = m_softlist.insertitem (ID, STR); // insert it to the list control to display m_softlist.setitemtext (ID, 1, s_name ); hkey hitem; // next-level registry handle if (: regopenkeyex (hsubkey, s_name, 0, key_read, & hitem) = error_success) {// extract the property information of the next-level Registry Program if (: regqueryvalueex (hitem, _ T ("displayname"), 0, & typesz, (lpbyte) s_displayname, & cbname) = error_success) {m_soft List. setitemtext (ID, 1, s_displayname);} If (: regqueryvalueex (hitem, _ T ("publisher"), 0, & typesz, (lpbyte) s_publisher, & cbname) = error_success) {m_softlist.setitemtext (ID, 2, s_publisher);} If (: regqueryvalueex (hitem, _ T ("installdate"), 0, & typesz, (lpbyte) s_installdate, & cbname) = error_success) {If (s_installdate! = NULL) {// determines whether it is null m_softlist.setitemtext (ID, 3, s_installdate) ;}} if (: regqueryvalueex (hitem, _ T ("estimatedsize"), 0, & typedword, (lpbyte) & s_estimatedsize, & cbname2) = error_success) {float f_size = s_estimatedsize/1024.0; // convert DWORD to cstring type cstring p_size; p_size.format (_ T ("%. 2f M "), f_size); m_softlist.setitemtext (ID, 4, p_size);} If (: regqueryvalueex (hitem, _ T (" displayversion "), 0, & typesz, (lpbyte) s_displayversion, & cbname) = error_success) {m_softlist.setitemtext (ID, 5, s_displayversion); }:: regclosekey (hitem ); // close the second-level registry (Program attribute information)} dwindex = dwindex + 1; // change dwindex and obtain the downward field cbname = 256 * sizeof (tchar) cyclically ); lresult = regenumkeyex (hsubkey, dwindex, s_name, & cbname, 0, null, null); Id ++;} regclosekey (hsubkey ); // close the first-level registry (read program information) return true;} regclosekey (hsubkey); Return false ;}

Call through the registry path:

AllRegKey(HKEY_LOCAL_MACHINE, TEXT("SoftWare\\Microsoft\\Windows\\CurrentVersion\\Uninstall"));

 

Running result: