Setting the Cursor Position in a Win32 Console Application

Question

How can I set the cursor position in a Win32 Console application? Preferably, I would like to avoid making a handle and using the Windows Console Functions. (I spent all morning running down that dark alley; it creates more problems than it solves.) I seem to recall doing this relatively simply when I was in college using stdio, but I can't find any examples of how to do it now. Any thoughts or suggestions would be greatly appreciated. Thanks.

Additional Details

Here is what I am now trying to do:

COORD pos = {x, y};
HANDLE hConsole_c = CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL );
char * str = "Some Text\r\n";
DWDORD len = strlen(str);

SetConsoleCursorPosition(hConsole_c, pos);
WriteConsole(hConsole_c, str, len, &dwBytesWritten, NULL);
CloseHandle(hConsole_c)

The text string str is never sent to the screen. Is there something else that I should be doing? Thanks.

Answer 1

See SetConsoleCursorPosition API

Edit:

Use WriteConsoleOutputCharacter() which takes the handle to your active buffer in console and also lets you set its position.

int x = 5; int y = 6;
COORD pos = {x, y};
HANDLE hConsole_c = CreateConsoleScreenBuffer( GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
SetConsoleActiveScreenBuffer(hConsole_c);
char *str = "Some Text\r\n";
DWORD len = strlen(str);
DWORD dwBytesWritten = 0;
WriteConsoleOutputCharacter(hConsole_c, str, len, pos, &dwBytesWritten);
CloseHandle(hConsole_c);

Answer 2

Using the console functions, you'd use SetConsoleCursorPosition. Without them (or at least not using them directly), you could use something like gotoxy in the ncurses library.

Edit: a wrapper for it is pretty trivial:

// Untested, but simple enough it should at least be close to reality...
void gotoxy(int x, int y) { 
    COORD pos = {x, y};
    HANDLE output = GetStdHandle(STD_OUTPUT_HANDLE);
    SetConsoleCursorPosition(output, pos);
}

Answer 3

If you are trying to simply move the cursor to the beginning of the line so that the next printf overwrites the current line, you can use printf("\r"). Otherwise, you will have to use a library or a platform specific API.

Answer 4

You were probably using ANSI excape code sequences, which do not work with Windows 32-bit console applications.

Answer 5

Yeah, you forgot to call SetConsoleActiveScreenBuffer. What exactly was the point of creating your own? Use GetStdHandle(STD_OUTPUT_HANDLE) to get a handle to the existing console.