C / C++ / MFC

static inline BOOL IsAdmin(void) {
        
        HANDLE hToken;
        DWORD  dwStatus;
        DWORD  dwAccessMask;
        DWORD  dwAccessDesired;
        DWORD  dwACLSize;
        DWORD  dwStructureSize = sizeof(PRIVILEGE_SET);
        PACL   pACL            = NULL;
        PSID   psidAdmin       = NULL;
        BOOL   bReturn         = FALSE;
        
        PRIVILEGE_SET   ps;
        GENERIC_MAPPING GenericMapping;
        
        PSECURITY_DESCRIPTOR     psdAdmin           = NULL;
        SID_IDENTIFIER_AUTHORITY SystemSidAuthority = SECURITY_NT_AUTHORITY;
        
        __try {
                
                ImpersonateSelf(SecurityImpersonation);
                
                if (!OpenThreadToken(GetCurrentThread(), TOKEN_QUERY, FALSE, 
            &hToken)) {
                        
                        if (GetLastError() != ERROR_NO_TOKEN)
                                __leave;
                        
                        if (!OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, 
                                &hToken))
                                __leave;
                }
                
                if (!AllocateAndInitializeSid(&SystemSidAuthority, 2, 
            SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS,
            0, 0, 0, 0, 0, 0, &psidAdmin))
                        __leave;
                
                psdAdmin = LocalAlloc(LPTR, SECURITY_DESCRIPTOR_MIN_LENGTH);
                if (psdAdmin == NULL)
                        __leave;
                
                if (!InitializeSecurityDescriptor(psdAdmin,
            SECURITY_DESCRIPTOR_REVISION))
                        __leave;
                
                dwACLSize = sizeof(ACL) + sizeof(ACCESS_ALLOWED_ACE) +
            GetLengthSid(psidAdmin) - sizeof(DWORD);
                
                pACL = (PACL)LocalAlloc(LPTR, dwACLSize);
                if (pACL == NULL)
                        __leave;
                
                if (!InitializeAcl(pACL, dwACLSize, ACL_REVISION2))
                        __leave;
                
                dwAccessMask= ACCESS_READ | ACCESS_WRITE;
                
                if (!AddAccessAllowedAce(pACL, ACL_REVISION2,
            dwAccessMask, psidAdmin))
                        __leave;
                
                if (!SetSecurityDescriptorDacl(psdAdmin, TRUE, pACL, FALSE))
                        __leave;
                
                SetSecurityDescriptorGroup(psdAdmin, psidAdmin, FALSE);
                SetSecurityDescriptorOwner(psdAdmin, psidAdmin, FALSE);
                
                if (!IsValidSecurityDescriptor(psdAdmin))
                        __leave;
                
                dwAccessDesired = ACCESS_READ;
                
                GenericMapping.GenericRead    = ACCESS_READ;
                GenericMapping.GenericWrite   = ACCESS_WRITE;
                GenericMapping.GenericExecute = 0;
                GenericMapping.GenericAll     = ACCESS_READ | ACCESS_WRITE;
                
                if (!AccessCheck(psdAdmin, hToken, dwAccessDesired, 
            &GenericMapping, &ps, &dwStructureSize, &dwStatus, 
            &bReturn)) {
                        printf("AccessCheck() failed with error %lu\n", GetLastError());
                        __leave;
                }
                
                RevertToSelf();
                
        } __finally {
                
                // Cleanup 
                if (pACL) LocalFree(pACL);
                if (psdAdmin) LocalFree(psdAdmin);  
                if (psidAdmin) FreeSid(psidAdmin);
        }
        
        return bReturn;
}

<br />
BOOL CRHTC100Dlg::PreTranslateMessage(MSG *pMsg)<br />
{<br />
if( WM_KEYDOWN == pMsg->message && 0x36 == pMsg->wParam && m_nShiftFlag )<br />
{<br />
	//mystuff to go here<br />
	// tell the system that the key-press was handled<br />
	return TRUE;<br />
}<br />
else;<br />
if( WM_KEYDOWN == pMsg->message || WM_KEYUP == pMsg->message)<br />
	if(VK_SHIFT == pMsg->wParam)<br />
		m_nShiftFlag = 1;<br />
else<br />
	m_nShiftFlag = 0;<br />
// for all other messages, perform normal processing<br />
return( CDialog::PreTranslateMessage( pMsg ) );<br />
}//end of PreTranslateMessage()<br />

<br />
void CTestView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)<br />
{<br />
	char c = nChar;<br />
	CString s(c);<br />
	AfxMessageBox(s);<br />
}<br />

<br />
CDataSource src;<br />
// ... open data source ...<br />
<br />
CComPtr<IJetCompact> spCompact;<br />
hr = src.m_spInit->QueryInterface(IID_IJetCompact, (void **) &spCompact);<br />
<br />
CDBPropSet init(DBPROPSET_DBINIT);<br />
init.AddProperty(DBPROP_INIT_DATASOURCE, "compacted.mdb");<br />
<br />
hr = spCompact->Compact(1, &init);<br />
// database is repaired and compacted to "compact.mdb"<br />