- 1 year ago
Multiline String with TCHAR and TextOut
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To work with multiline strings containing TCHAR characters and display them using the TextOut
function in C++, you can follow these steps:
- Define the multiline string using the
TCHAR
data type. TheTCHAR
type can represent eitherchar
orwchar_t
based on your project configuration.
cppTCHAR multilineString[] = _T("Line 1\nLine 2\nLine 3");
- Calculate the length of the multiline string using the appropriate function, such as
strlen
orwcslen
.
cppint stringLength = _tcslen(multilineString);
- Use the
TextOut
function to display the multiline string. You will need to call this function for each line of the string, specifying the desired position on the device context (DC).
cppHDC hdc; // Get the device context
int lineCount = 0;
int lineHeight = 20; // Height of each line
int y = 50; // Starting position for the first line
TCHAR* nextLine = multilineString;
while (*nextLine)
{
// Find the end of the current line
TCHAR* endOfLine = _tcschr(nextLine, _T('\n'));
if (endOfLine == NULL)
endOfLine = nextLine + _tcslen(nextLine);
// Copy the current line to a null-terminated buffer
int lineLength = endOfLine - nextLine;
TCHAR* lineBuffer = new TCHAR[lineLength + 1];
_tcsncpy(lineBuffer, nextLine, lineLength);
lineBuffer[lineLength] = _T('\0');
// Display the line using TextOut
TextOut(hdc, 10, y + lineCount * lineHeight, lineBuffer, lineLength);
// Clean up the line buffer
delete[] lineBuffer;
// Move to the next line
nextLine = endOfLine;
if (*nextLine == _T('\n'))
nextLine++;
lineCount++;
}
In this example, the TextOut
function is used to display each line of the multiline string separately. The hdc
variable represents the device context obtained from the appropriate source, such as a window or a printer.
By looping through each line of the multiline string and using the TextOut
function with the appropriate position, you can display the string on the device context with each line appearing on a new line.
Note: Make sure to include the necessary headers, such as <Windows.h>
, and ensure that you have set the appropriate character set for your project configuration (e.g., Unicode or multibyte).