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Terminal control/Positional read: Difference between revisions
Add C/Win32.
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20 REM So we subtract one from the coordinates
30 LET c$ = SCREEN$(5,2)</lang>
=={{header|C}}==
With the Windows console, call <code>GetConsoleScreenBufferInfo()</code> to find the top-left corner of the display screen. Then add (3, 6) to the top-left corner and call <code>ReadConsoleOutputCharacterW()</code> to read character. This program reckons that the top-left corner is (0, 0).
{{libheader|Win32}}
<lang c>#include <windows.h>
#include <wchar.h>
int
main()
{
CONSOLE_SCREEN_BUFFER_INFO info;
COORD pos;
HANDLE conout;
long len;
wchar_t c;
/* Create a handle to the console screen. */
conout = CreateFileW(L"CONOUT$", GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
0, NULL);
if (conout == INVALID_HANDLE_VALUE)
return 1;
/* Where is the display window? */
if (GetConsoleScreenBufferInfo(conout, &info) == 0)
return 1;
/* c = character at position. */
pos.X = info.srWindow.Left + 3; /* Column */
pos.Y = info.srWindow.Top + 6; /* Row */
if (ReadConsoleOutputCharacterW(conout, &c, 1, pos, &len) == 0 ||
len <= 0)
return 1;
wprintf(L"Character at (3, 6) had been '%lc'\n", c);
return 0;
}</lang>
=={{header|REXX}}==
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