1 //
2 // password.c
3 //
4 // Password support for Win9x
5 //
6 #include <windows.h>
7 #include <tchar.h>
8
9 typedef BOOL (WINAPI *VERIFYSCREENSAVEPWD)(HWND hwnd);
10 typedef VOID (WINAPI *PWDCHANGEPASSWORD)(LPCTSTR lpcRegkeyname, HWND hwnd,UINT uiReserved1,UINT uiReserved2);
11
VerifyPassword(HWND hwnd)12 BOOL VerifyPassword(HWND hwnd)
13 {
14 // Under NT, we return TRUE immediately. This lets the saver quit,
15 // and the system manages passwords. Under '95, we call VerifyScreenSavePwd.
16 // This checks the appropriate registry key and, if necessary,
17 // pops up a verify dialog
18
19 HINSTANCE hpwdcpl;
20 VERIFYSCREENSAVEPWD VerifyScreenSavePwd;
21 BOOL fResult;
22
23 if(GetVersion() < 0x80000000)
24 return TRUE;
25
26 hpwdcpl = LoadLibrary(_T("PASSWORD.CPL"));
27
28 if(hpwdcpl == NULL)
29 {
30 return FALSE;
31 }
32
33
34 VerifyScreenSavePwd = (VERIFYSCREENSAVEPWD)GetProcAddress(hpwdcpl, "VerifyScreenSavePwd");
35
36 if(VerifyScreenSavePwd == NULL)
37 {
38 FreeLibrary(hpwdcpl);
39 return FALSE;
40 }
41
42 fResult = VerifyScreenSavePwd(hwnd);
43 FreeLibrary(hpwdcpl);
44
45 return fResult;
46 }
47
ChangePassword(HWND hwnd)48 BOOL ChangePassword(HWND hwnd)
49 {
50 // This only ever gets called under '95, when started with the /a option.
51 HINSTANCE hmpr = LoadLibrary(_T("MPR.DLL"));
52 PWDCHANGEPASSWORD PwdChangePassword;
53
54 if(hmpr == NULL)
55 return FALSE;
56
57 PwdChangePassword = (PWDCHANGEPASSWORD)GetProcAddress(hmpr, "PwdChangePasswordA");
58
59 if(PwdChangePassword == NULL)
60 {
61 FreeLibrary(hmpr);
62 return FALSE;
63 }
64
65 PwdChangePassword(_T("SCRSAVE"), hwnd, 0, 0);
66 FreeLibrary(hmpr);
67
68 return TRUE;
69 }
70