Write a windows program to output a blank box with your name given

Steps:

1. Open DEV C++.
2. Click “File” then “New” after that “Project”.
3. From “Basic” select “Wildows Application”.
4. Select “C++ project”.
5. Give a project name.
6. Click “ok” then “save”.

Now you get the full program code here. You dont have to write the same code again and again for different programs.
Steps:

1. From “Execute” menu click on “Compile and run”.
2. Give it a name and save it.
3. Wait until your compilation is completed by the compiler.
4. You see a blank box with the name “Caption”.
5. Close the blank box.
6. In your program code press CTRL+F.
7. Here you type the name “Caption” then click on “find”.
8. Change the word with “your name”.
9. From “Execute” menu click on “Compile and run” again.
You get you result with your name printed on a blank box.

#include <windows.h>

/* This is where all the input to the window goes to */
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
switch(Message) {

/* Upon destruction, tell the main thread to stop */
case WM_DESTROY: {
PostQuitMessage(0);
break;
}

/* All other messages (a lot of them) are processed using default procedures */
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}

/* The ‘main’ function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wc; /* A properties struct of our window */
HWND hwnd; /* A ‘HANDLE’, hence the H, or a pointer to our window */
MSG msg; /* A temporary location for all messages */

/* zero out the struct and set the stuff we want to modify */
memset(&wc,0,sizeof(wc));
wc.cbSize = sizeof(WNDCLASSEX);
wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);

/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = “WindowClass”;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name “A” to use the project icon */

if(!RegisterClassEx(&wc)) {
MessageBox(NULL, “Window Registration Failed!”,”Error!”,MB_ICONEXCLAMATION|MB_OK);
return 0;
}

hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,”WindowClass”,”Ranjan Barman”,WS_VISIBLE|WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, /* x */
CW_USEDEFAULT, /* y */
640, /* width */
480, /* height */
NULL,NULL,hInstance,NULL);

if(hwnd == NULL) {
MessageBox(NULL, “Window Creation Failed!”,”Error!”,MB_ICONEXCLAMATION|MB_OK);
return 0;
}

/*
This is the heart of our program where all input is processed and
sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
this loop will not produce unreasonably high CPU usage
*/
while(GetMessage(&msg, NULL, 0, 0) > 0) { /* If no error is received… */
TranslateMessage(&msg); /* Translate key codes to chars if present */
DispatchMessage(&msg); /* Send it to WndProc */
}
return msg.wParam;
}