C++ Question

iceman559 · Posted: Sat Sep 27, 2003 5:41 am Post subject: C++ Question

ok, are the following code snippets C or C++ or even if they are real code?

Code:

HFONT hf;
HDC hdc;
long lfHeight;

hdc = GetDC(NULL);
lfHeight = -MulDiv(12, GetDeviceCaps(hdc, LOGPIXELSY), 72);
ReleaseDC(NULL, hdc);

hf = CreateFont(lfHeight, 0, 0, 0, 0, TRUE, 0, 0, 0, 0, 0, 0, 0, "Times New Roman");

if(hf)
{
DeleteObject(g_hfFont);
g_hfFont = hf;
}
else
{
MessageBox(hwnd, "Font creation failed!", "Error", MB_OK | MB_ICONEXCLAMATION);
}

and

Code:

char szSize[100];
char szTitle[] = "These are the dimensions of your client area:";
HFONT hfOld = SelectObject(hdc, hf);

SetBkColor(hdc, g_rgbBackground);
SetTextColor(hdc, g_rgbText);

if(g_bOpaque)
{
SetBkMode(hdc, OPAQUE);
}
else
{
SetBkMode(hdc, TRANSPARENT);
}

DrawText(hdc, szTitle, -1, prc, DT_WORDBREAK);

wsprintf(szSize, "{%d, %d, %d, %d}", prc->left, prc->top, prc->right, prc->bottom);
DrawText(hdc, szSize, -1, prc, DT_SINGLELINE | DT_CENTER | DT_VCENTER);

SelectObject(hdc, hfOld);

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Banshee · Posted: Sat Sep 27, 2003 5:44 pm Post subject:

Looks more like C++ than C... btw, what is this hdc type of variable?

iceman559 · Posted: Sat Sep 27, 2003 6:15 pm Post subject:

i dont know, thats y I was asking, i tried embedding it into my program, but it doesnt work it says none of the variables are declared, so i try declaring them, and it doesnt work, heres where i got it from, http://www.winprog.org/tutorial/fonts.html

_________________
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::The Army of Chaos Empire

Banshee · Posted: Sat Sep 27, 2003 7:31 pm Post subject:

This is C++ for programs like Borland C++ or Visual C++

iceman559 · Posted: Sat Sep 27, 2003 8:11 pm Post subject:

no, C++ is the same. It wouldn't change code just because u have a diff program. also, it just has help for those programs. all the other code works fine with Dev, its just the font stuff

_________________
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::The Army of Chaos Empire

John Galt · Posted: Sun Sep 28, 2003 6:11 am Post subject:

hdc means Handle Device Context.

Delphi Help -> WinAPI wrote:

Property Handle: HDC;

The Handle property specifies the Windows GDI handle to the device context for this canvas.

Set Handle to the HDC for the device context the canvas must draw into. When a windowed control responds to a Windows paint message, the HDC for drawing is passed in to the PaintWindow method. In other cases, an HDC can be obtained for a window by calling the GetDeviceContext method of a control. Additionally, Windows provides API calls to obtain an HDC for a printer or for a memory image.

Sorry, I'm not familiar with C, so I can't help you any more...