I'm trying to make my first polygon, however seems that the dream is broken.

Because I wrote a code, complied it and voila ... the triangle is not displayed

Can somebody say what is wrong with that code?

Thanks

Here is the code:

Code :
#pragma once
 
#include <Windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <gl\GL.h>
#include <gl\glu.h>
#include <gl\glut.h>
 
HDC         hDC=NULL;
HGLRC       hRC=NULL;
 
GLvoid GL_ReSizeGLScene(GLsizei width, GLsizei height);
int GL_init( GLvoid );
int GL_drawit( GLvoid );
 
typedef struct {
    HWND hWnd;
} Glab_t;
 
static Glab_t glab;
 
char szClassName[ ] = "GLab";
 
static LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
    switch (message) {
        case WM_DESTROY:
            PostQuitMessage (0);
            break;
        case WM_SIZE:
            GL_ReSizeGLScene(LOWORD(lParam),HIWORD(lParam));
            break;
        default:
            return DefWindowProc (hwnd, message, wParam, lParam);
    }
    return 0;
}
 
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    MSG messages;
    RECT rect;
    WNDCLASSEX wndClass;
    int screenWidth, screenHeight;
    int x, y, w, h;
    GLuint      PixelFormat;
 
    screenWidth = GetSystemMetrics(SM_CXSCREEN);
    screenHeight = GetSystemMetrics(SM_CYSCREEN);
 
    rect.left = (screenWidth - 582) / 2;
    rect.top = (screenHeight - 358) / 2;
    rect.right = rect.left + 582;
    rect.bottom = rect.top + 358;
 
    x = rect.left;
    y = rect.top;
    w = 640;
    h = 480;
 
 
    wndClass.hInstance = hInstance;
    wndClass.lpszClassName = szClassName;
    wndClass.lpfnWndProc = WindowProcedure;
    wndClass.style = CS_DBLCLKS;
    wndClass.cbSize = sizeof (WNDCLASSEX);
    wndClass.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wndClass.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wndClass.hCursor = LoadCursor (NULL, IDC_ARROW);
    wndClass.lpszMenuName = NULL;
    wndClass.cbClsExtra = 0;
    wndClass.cbWndExtra = 0;
    wndClass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
 
    if (!RegisterClassEx (&wndClass)) {
        return 0;
    }
 
    glab.hWnd = CreateWindowEx (
           0,
           szClassName,
           "GLab - OpenGL",
           WS_OVERLAPPEDWINDOW,
           x,
           y,
           w,
           h,
           HWND_DESKTOP,
           NULL,
           hInstance,
           NULL 
           );
 
    static  PIXELFORMATDESCRIPTOR pfd=  {
        sizeof(PIXELFORMATDESCRIPTOR),
        1,
        PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
        PFD_TYPE_RGBA,
        16, // Can be 32 tough :)
        0, 0, 0, 0, 0, 0,
        0,
        0,
        0,
        0, 0, 0, 0, 
        16, 
        0,
        0,
        PFD_MAIN_PLANE, 
        0,
        0, 0, 0 
    };
 
    if (!(hDC=GetDC(glab.hWnd))) {
        MessageBox(NULL,"Can't Create A GL Device Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return FALSE;
    }
 
    if (!(PixelFormat=ChoosePixelFormat(hDC,&pfd))) {
        MessageBox(NULL,"Can't Find A Suitable PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return FALSE;
    }
 
    if(!SetPixelFormat(hDC,PixelFormat,&pfd)) {
        MessageBox(NULL,"Can't Set The PixelFormat.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return FALSE;
    }
 
    if (!(hRC=wglCreateContext(hDC))) {
        MessageBox(NULL,"Can't Create A GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return FALSE;
    }
 
    if(!wglMakeCurrent(hDC,hRC)) {
        MessageBox(NULL,"Can't Activate The GL Rendering Context.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return FALSE;
    }
 
    ShowWindow (glab.hWnd, nCmdShow);
    SetForegroundWindow(glab.hWnd);
    SetFocus(glab.hWnd);
    GL_ReSizeGLScene( w, h );
 
    if (!GL_init() ) {
        MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return false;
    }
 
    if( !GL_drawit() ) {
        MessageBox(NULL,"Initialization Failed.","ERROR",MB_OK|MB_ICONEXCLAMATION);
        return false;
    }
 
    while (GetMessage (&messages, NULL, 0, 0)) {
        TranslateMessage(&messages);
        DispatchMessage(&messages);
    }
 
    return messages.wParam;
}
 
GLvoid GL_ReSizeGLScene(GLsizei width, GLsizei height) {
    if (height==0) {
        height=1;
    }
 
    glViewport(0,0,width,height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,100.0f);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}
 
int GL_init( GLvoid ) {
    glShadeModel(GL_SMOOTH);
    glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
    glClearDepth(1.0f);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LEQUAL);
    glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
    return true;
}
 
int GL_drawit( GLvoid ) {
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    glTranslatef(-1.5f,0.0f,-6.0f);
    glBegin(GL_TRIANGLES);
        glVertex3f( 0.0f, 1.0f, 0.0f);
        glVertex3f(-1.0f,-1.0f, 0.0f);
        glVertex3f( 1.0f,-1.0f, 0.0f);
    glEnd();            
    return true;
}

By the way, I'm using OpenGL 1.4 ( Don't be rude D: , I'm only 15, don't have that much money for new PC )