What is the Differentiate between dos based programming and windows programming?

Answer 1

A DOS program's output/input is based souly on the DOS proment, while a win api based program is based within its own window.

Code is untested!

// DOS Prompt Code c/c++ - With output

#include <iostream> // Input Output Stream

int main()

{

std::cout << "Hello World"; // Output Command

return 0;

}

// Win Api Code c/c++ just window

#include <windows.h>

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow)

{

static TCHAR szAppName[] = TEXT ("Opengl");

HWND hwnd;

WNDCLASS wndclass;

HDC hdc;

MSG msg;

HGLRC hrc;

wndclass.style = CS_HREDRAW | CS_VREDRAW;

wndclass.lpfnWndProc = WndProc;

wndclass.cbClsExtra = 0;

wndclass.cbWndExtra = 0;

wndclass.hInstance = hInstance;

wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION);

wndclass.hCursor = LoadCursor (NULL, IDC_ARROW);

wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH);

wndclass.lpszMenuName = NULL;

wndclass.lpszClassName = szAppName;

if (!RegisterClass (&wndclass))

{

MessageBox (NULL, TEXT ("This program requires Windows NT!"),

szAppName, MB_ICONERROR);

return 0;

}

hwnd = CreateWindow (szAppName,

TEXT ("OpengGL"),

WS_OVERLAPPEDWINDOW,

CW_USEDEFAULT,

CW_USEDEFAULT,

CW_USEDEFAULT,

CW_USEDEFAULT,

NULL,

NULL,

hInstance,

NULL);

ShowWindow (hwnd, iCmdShow);

UpdateWindow (hwnd);

while (GetMessage (&msg, NULL, 0, 0))

{

TranslateMessage (&msg);

DispatchMessage (&msg);

}

return msg.wParam;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

{

switch (message)

{

case WM_PAINT:

opengl.callDisplayFunc();

return 0;

case WM_SIZE:

return 0;

case WM_KEYDOWN:

switch(wParam)

{

case VK_ESCAPE:

SendMessage(hwnd,WM_DESTROY,wParam,lParam);

break;

}

return 0;

case WM_DESTROY:

PostQuitMessage(0);

return 0;

}

return DefWindowProc (hwnd, message, wParam, lParam);

}