Using Unicode font in C++ console app - c++

Question

How do I change the font in my C++ Windows console app?
It doesn't seem to use the font cmd.exe uses by default (Lucida Console). When I run my app through an existing cmd.exe (typing name.exe) it looks like this: http://dathui.mine.nu/konsol3.png which is entierly correct.
But when I run my app seperatly (double-click the .exe) it looks like this: http://dathui.mine.nu/konsol2.png.
Same code, two different looks.
So now I wonder how I can change the font so it always looks correctly regardless of how it's run.
EDIT:
Ok, some more information. When I just use this little snippet:
SetConsoleOutputCP(CP_UTF8);
wchar_t s[] = L"èéøÞǽлљΣæča";
int bufferSize = WideCharToMultiByte(CP_UTF8, 0, s, -1, NULL, 0, NULL, NULL);
char* m = new char[bufferSize];
WideCharToMultiByte(CP_UTF8, 0, s, -1, m, bufferSize, NULL, NULL);
wprintf(L"%S", m);
it works with the correct font. But in my real application I use WriteConsoleOutput() to print strings instead:
CHAR_INFO* info = new CHAR_INFO[mWidth * mHeight];
for(unsigned int a = 0; a < mWidth*mHeight; ++a) {
info[a].Char.UnicodeChar = mWorld.getSymbol(mWorldX + (a % mWidth), mWorldY + (a / mWidth));
info[a].Attributes = mWorld.getColour(mWorldX + (a % mWidth), mWorldY + (a / mWidth));
}
COORD zero;
zero.X = zero.Y = 0;
COORD buffSize;
buffSize.X = mWidth;
buffSize.Y = mHeight;
if(!WriteConsoleOutputW(window, info, buffSize, zero, &rect)) {
exit(-1);
}
and then it uses the wrong font. I use two different windows, created like this:
mHandleA = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0,
NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
Might I be setting the codepage for just the standard output or something?

Answer 1

Windows stores the cmd settings (including the font) in the registry using the exe path as the key. The root key is 'HKEY_CURRENT_USER\Console' so if you take a look in there with regedit you should see several sub-keys named after varous exe's.
To copy the settings of an existing exe, you can export the key to a text file, then edit the file to change the key name to that of your exe, then reimport it.
You can also progmatically modify the registry though i doubt that would take immediate effect w.r.t. to your console window.

Answer 2

You could try the SetCurrentConsoleFontEx() function.

Answer 3

For Vista and above, there is SetCurrentConsoleFontEx, as already has been said.
For 2K and XP, there is an undocumented function SetConsoleFont; e.g. read here.
typedef BOOL (WINAPI *FN_SETCONSOLEFONT)(HANDLE, DWORD);
FN_SETCONSOLEFONT SetConsoleFont;
..........
HMODULE hm = GetModuleHandle(_T("KERNEL32.DLL"));
SetConsoleFont = (FN_SETCONSOLEFONT) GetProcAddress(hm, "SetConsoleFont");
// add error checking
..........
SetConsoleFont(GetStdHandle(STD_OUTPUT_HANDLE), console_font_index);
Now, console_font_index is an index into console font table, definition of which is unknown. However, console_font_index == 10 is known to identify Lucida Console (a Unicode font). I'm not sure how stable is this value across different OS versions.
UPDATE
After dutt's comment, I've run an experiment on a clean XP SP2 setup.
Initially, GetNumberOfConsoleFonts(), indeed, returns 10, and font indices 0..9 specify various raster fonts.
After I open a console with Lucida font selected in its properties (just once; I can close it immediately after opening but the effect is the same), suddenly GetNumberOfConsoleFonts() starts to return 12, and indices 10 and 11 select Lucida of different sizes.
So it seems this trick worked for me when I played with it because I always had running at least one console app with Lucida font selected.
Thus, for practical purposes, jon hanson's answer seems better. Besides offering better control, it actually works. :)