hey, I use DEV-C++ and I want to know how to display text in a new windows project. this code that i used from an example doesnt work.

#include <windows.h>
#include<iostream>
#include<string.h>

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[ ] = "WindowsApp";

int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)

{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default color as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Warning!",       /* Title Text */
           WS_OVERLAPPEDWINDOW, /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           544,                 /* The programs width */
           375,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

    /* Make the window visible on the screen */
    ShowWindow (hwnd, nFunsterStil);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}



/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  /* handle the messages */
    {
           case WM_PAINT:
           
           hdc = BeginPaint (hwnd, &ps);
           GetClientRect (hwnd, &rc);
            rc.bottom = rc.bottom / 2;
            DrawText (hdc, "Hello, World!", -1, &rc,
            DT_SINGLELINE | DT_CENTER | DT_VCENTER);

            EndPaint (hwnd, &ps);
            return 0;
            break;
               

        case WM_DESTROY:
            PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
            break;
        default:                      /* for messages that we don't deal with */
            return DefWindowProc (hwnd, message, wParam, lParam);
    }

    return 0;
}

The code to display text that i found starts on line 82.
Any solutions?

You have no PAINTSTRUCT variable declared from what i see.I'm curious how can it compile without giving you an error about this.

Ok so could you post the PAINTSTRUCT code? C++ actually did give me an error about PAINTSTRUCT.

Just declare

PAINTSTRUCT ps;

Inside the window procedure's body.

Okay, that got it working. Thanks for the assistance.

Ok, that's working too. And do you know how to change the text color when you use the DrawText function? (Line 87 in first post).

Try this

#include <windows>

class TxtColor  {
   LOGBRUSH lgbr;
   HGDIOBJ clrHndl;
   HGDIOBJ prevHndl;
   HDC Hdc;

   TxtColor () {}
public:
   TxtColor (HDC hdc,COLORREF clr) : Hdc(hdc) {
      lgbr.lbStyle=BS_SOLID;
      lgbr.lbColor=clr;
      lgbr.lbHatch=DIB_RGB_COLORS;

      clrHndl=CreateBrushIndirect (&lgbr);
    }

   ~TxtColor ()  {
      DeselectColor ();
    }

   void SelectColor ()  {
      prevHndl=SelectObject (Hdc,clrHndl);
    }
   void DeselectColor ()  { //you need this to switch to the prev color
      SelectObject (Hdc,prevHndl);
    }
 };

//use

HDC Hdc;
TxtColor somecolor (Hdc,0x34534);
somecolor.SelectColor ();
TextOut (Hdc,0,0,"qwe",3);
somecolor.DeselectColor ();

Edited 5 Years Ago by caut_baia: n/a

You know .. it doesn't work like this if you want to learn.Half of your code is already a template generated by vc++ so you should do some research about what you need otherwise you won't learn by asking 20 questions a day.If you instead were just curious i'm happy to help.

I'm just curious. This is the last question I'll ask. If I have any more, I'll start a new thread or look online.

This question has already been answered. Start a new discussion instead.