Windows programming with C++

Windows programming with C++
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Written by Sagar RabidasFebruary 3, 2022
8 min read
C++
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Techiio-author
Sagar Rabidas

Software Developer

In this blog, we will discuss Windows programming with C++

Windows Programming

Windows programming is synonymously known as c/c++ programming language because the operating device gift within its far written in c. Most developers try to analyze c/c++ language no matter pure item-orientated language because it creates the bottom for gaining knowledge of and implementation of windows programming. All principal embedded software is written in windows programming simplest like the clr of the.net framework is likewise written in a home windows programming language. It makes documents and folders stored with an extension where. Cpp is used for saving and wants to include “stdafx.h” for retrieving the record and message.

Syntax:

There is a proper syntax flow for Windows programming with C++ which is represented as follows:

# include “stdafx.h”
#include<Windows.h>
Int WINAPI Winmain(Hinstance hinstnc, Hinstance hPrevInstnc, Pstr szcmd, int icmdshw)
{
MessageBox(NULL, Text(“welcome_..”), Text(“welcome”), Mb_ok);
Return 0;
}

Each has a significance where,

  • Windows.h: It signifies the header inclusion for the windows program.
  • WINAPI: It stands for the Windows application programming interface which lets the compiler understand that the program contains graphical user components than console components.
  • WinMain: This acts as the main program for the windows programs which considers four functions as parameters.
  • HINSTANCE: This acts as one of the handles to instances as it means the object-oriented programming is being handled for some of the other reasons and gets blended with other new instance programmers for implementation as well.
  • PSTR: This stands for the pointer to string which means it acts as a char* pointer only but with little difference.
  • Message Box: This is a method that is used synonymously as a print statement for printing messages relevant to it.
  • MB_Ok: It stands for a # define a function to acknowledge the print or display of text is proper.

How to create Windows programming with C++?

Certain prerequisites need to be taken care of while creating Windows programming with C++ like:

  • Install Visual Studio code (version) as per requirement.
  • Go to the main menu and then select File > New > Project to open and create a new project in the dialog box all this will happen in Visual Studio Code.
  • At top of the dialog box just set language to C++ and then set the platform as Windows, then set the project type as Desktop.
  • Further, select the project type as Windows Desktop Wizard then select next for further manipulation.
  • Choose to create the desktop-related button for the project.
  • Then start to create the code for editing and manipulating.

Let’s deep dive into the creation of code for which Windows Desktop Application is needed:

  • Just as C and C++ program has the main function to start the program flow same in the case of windows programming it consists of WinMain function to start the program flow which is represented as follows:
int WINAPI WinMain (
_ip_ HINSTANCE hInstnce,
_Ip_op_t_ HINSTANCE hPrvInstnc,
_Ip_ LPSTR lp_cmd_line,
_Ip_ int k_CmdShow_0
);
  • To indicate that it is getting run using Windows desktop program that it is important to understand the headers that need to be included like <windows>, <tchar.h>. If there is something where Unicode is already declared as part of code, then it is not much needed to char exclusively if enabled only wtchar can directly be used. Represented as follows:
#include<windows.h>
#include<wtchar.h>
  • WinMain() function is used for every windows desktop application where it can be called and used whenever some events are occurring over the windows for transition. Suppose the developer try to hit the Ok button over the window this event will take place in the presence of WinMain() function where the call-back function includes parameters having definite significance:
Lrslt_Call Windw_Proc (
Ip_Hd hwndow,
Ip_Uint Msg,
Ip_Wprm wprm,
Ip_Lprm lprm)

Examples

Let us discuss examples of windows programming.

Example #1

This code snippet is an example to demonstrate how to register within a window class as represented below.

const wchar_t CLASS_NAME [] = L"Welcome_Demo_Class";
WINDW_CLASS wc_0 = { };
wc_0.lpfnWndw_Proc = WindowProc_0;
wc_0.hInstance_1 = hInstance_c;
wc_0.lpszClassName_0 = CLASS_NAME_1;

Example #2

There is a way to create a new instance of the window by calling the CreateWindowExp function which further has some parameters for reference.

HWND hwnd_0 = CreateWindowExp (
0,
CLASS_NAME,
L"New to windows programming",
WS_OVERLAPPEDWINDOW,
CW_USE_DEFAULT, CW_USE_DEFAULT, CW_USE_DEFAULT, CW_USE_DEFAULT,
NULL,
NULL,
hInstance,
NULL
);
if (hwnd_0 == NULL)
{
return 0;
}

Example #3

This program demonstrates the code snippet for message display properly for any windows programming so that the understanding and visibility get enhanced.

MSG msg_0 = { };
While (getMessage (&msg_0, NULL, 0, 0) > 0)
{
TranslateMessage (&msg_0);
DispatchMessage (&msg_0);
}

C
C++
Windows programming
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