Question

I’m beginner in Win32Api, I tried to make calculator but I failed because of conversion of data types between each other

Example:

int N1 = GetDlgItemText(WID,IDC_N1,NULL,NULL);
int N2 = GetDlgItemText(WID,IDC_N2,NULL,NULL);
int RESULT = N1+N2;
MessageBox(NULL,RESULT,L"Message",MB_OK);

The example in above tell me the following error
(cannot convert parameter 2 from ‘int’ to ‘LPCWSTR’)

And the reason for this error is conversion of data types between each other

Please anybody help me

Answer 1

Here is correct code for your task:

wchar_t Str1[100], Str2[100], ResStr[100];  
GetDlgItemText(WID, IDC_N1, Str1, 100);  
GetDlgItemText(WID, IDC_N2, Str2, 100);  
int N1 = _wtoi(Str1);
int N2 = _wtoi(Str2);
int RESULT = N1 + N2; 
_itow(RESULT, ResStr, 10);
MessageBox(NULL, ResStr, L"Message",MB_OK);

Useful links:
http://msdn.microsoft.com/en-us/library/ms645489(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/ms645505(v=vs.85).aspx