hello.. i have a problem with my program... i don't know how to call C function from C++ coding.. i already try use extern C, but it make my program illegal operation... how?? any one can help me!!?!?!? i hope someone can help me.. tq

i do as you write... but when i compile... it have this warning want.c(1957) : warning C4013: 'OpenLoginDlg' undefined; assuming extern returning int and i try to build exe... it appear Microsoft Visual C++ Debug Library... so what must i do now??

anyone can help me!!!!

thanks... can you help me to solve my above problem... (c and visual c++)

never mind for login dialog... but i want you to solve this problem... because this i my main problem........ this is my C code case IDC_OK: database db; //this i call function from c++ file db.Open(CRecordset::dynaset,"password); while(!db.IsEOF()) { if(db.m_userID == IDC_USER_NAME) { if(db.m_password == IDC_PASSWORD) { ShellExecute (NULL, "open", "d:\\games\\Same.exe",NULL,NULL,SW_SHOWNA); exit(0); } else { AfxMessageBox("Incorrect password!"); m_word=""; UpdateData(false); return; } } loginConn.MoveNext(); } but this error appear error C2065: 'database' : undeclared identifier error C2146: syntax error : missing ';' before identifier 'db' error C2065: 'db' : undeclared identifier error C2224: left of '.Open' must have struct/union typeerror C2065: 'CRecordset' : undeclared identifier error C2143: syntax error : missing ')' before ':'

i do this void CMainFrame::OnLogin() { login dlg; dlg.DoModal(); } but this error appear!! error C2065: 'login' : undeclared identifier error C2146: syntax error : missing ';' before identifier 'dlg' error C2065: 'dlg' : undeclared identifier error C2228: left of '.DoModal' must have class/struct/union type

where to i post my code in this forum??

thanks... it's work, but can you tell me how to appear the dialog box after we click the menu bar?????

Hello.. I want to know something! In Visual C++ also can use C code, but can or not C code in same project call C++ function?? like this, my C code is in what.c and I want to call function in loginDlg.C++, the function name is CLoginDLg... i try do this in file what.c CLoginDlg dlg; dlg.DoModal(); but this error appear when i compile it error C2065: 'CLoginDlg' : undeclared identifier error C2146: syntax error : missing ';' before identifier 'dlg' error C2065: 'dlg' : undeclared identifier error C2224: left of '.DoModal' must have struct/union type anybody can help me.. or i do wrong!!??

hi all; I am writting an MFC app using the Doc/View and MDI. My problem is my additional menu bar was grayed and can not click but i dont set it as grayed. And the original menu bar was appear and can click on it. So how to solve this problem.

hello.. anybody can help me? Please help me to solve this error problem : "error C2504: 'CRecordset' : base class undefined" tq..

but how to write in visual c++ code???

hello; i new in Visual C++, so i need some help to how do compare user input (ID and password) with data in my database file. and now i use Ms Access as my database file... please help me... thanks