Visual C++ and MFC Programming 2nd Edition

Chapter 9 Strings Visual C++ and MFC Fundamentals

{

CExerciseDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

CString Country("Cote d'Ivoire");

const char *Area = Country.GetBuffer(2);

pDC->TextOut(10, 10, Country);

pDC->TextOut(10, 30, Area);

}

If you want to specify the number of characters to consider when retrieving the buffer,

use the CString::GetBufferSetLength() method. Its syntax is:

LPTSTR GetBufferSetLength(int nNewLength);

The nNewLength argument specifies the new length of the buffer.

To declare a CString variable that has a single character, use the following constructor:

CString(TCHAR ch, int nRepeat = 1);

The character can be included between single-quotes. Here is an example:

void CExoView::OnDraw(CDC* pDC)

{

CExoDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

CString Letter('A');

pDC->TextOut(20, 22, Letter);

}

If you want the character to be repeated more than once, you can pass a second argument

as nRepeat that holds the number of times that the ch character must be repeated. Here is

an example:

void CExerciseView::OnDraw(CDC* pDC)

{

CExerciseDoc* pDoc = GetDocument();

ASSERT_VALID(pDoc);

CString Letter('A');

pDC->TextOut(20, 20, Letter);

CString Character('$', 25);

pDC->TextOut(20, 40, Character);