README.md

Description

This code shows how to use buttons, editboxes and checkboxes in windows.

More Info

Submitted On
By	Jon Steffensen
Level	Beginner
User Rating	4.8 (77 globes from 16 users)
Compatibility	C, C++ (general)
Category	Controls/ Forms/ Dialogs/ Menus
World	C / C++
Archive File

API Declarations

<windows.h>

Source Code

#include <windows.h>
// Define control identifiers
#define IDC_EDIT 1001
#define IDC_STATIC 1002
#define IDC_BUTTON 1003
#define IDC_CHECK 1004
static HINSTANCE hInstance = NULL;
char szClassName[] = "ControlClasses";
// A function to set a control's text to the default font
int SetDefaultFont(int identifier, HWND hwnd)
{
 SendDlgItemMessage(
 hwnd,
 identifier,
 WM_SETFONT,
 (WPARAM)GetStockObject(DEFAULT_GUI_FONT),
 MAKELPARAM(TRUE, 0));
 return 0;
}
// A function to create static text
HWND CreateStatic(char* tempText, int x, int y, int width, int height, int identifier, HWND hwnd)
{
 HWND hStaticTemp;
 hStaticTemp = CreateWindowEx(
 0,
 "STATIC",
 tempText,
 WS_CHILD | WS_VISIBLE,
 x, y,
 width, height,
 hwnd, (HMENU)identifier, hInstance, NULL);
 return hStaticTemp;
}
// A function to create a textarea
HWND CreateEdit(char* tempText, int x, int y, int width, int height, int identifier, HWND hwnd)
{
 HWND hEditTemp;
 hEditTemp = CreateWindowEx(
 WS_EX_CLIENTEDGE,
 "EDIT",
 tempText,
 WS_CHILD | WS_VISIBLE,
 x, y,
 width, height,
 hwnd, (HMENU)identifier, hInstance, NULL);
 return hEditTemp;
}
// A function to create a button
HWND CreateButton(char* tempText, int x, int y, int width, int height, int identifier, HWND hwnd)
{
 HWND hButtonTemp;
 hButtonTemp = CreateWindowEx(
 0,
 "BUTTON",
 tempText,
 WS_CHILD | WS_VISIBLE,
 x, y,
 width, height,
 hwnd, (HMENU)identifier, hInstance, NULL);
 return hButtonTemp;
}
// A function to create a checkbox
HWND CreateCheck(char* tempText, int x, int y, int width, int height, int identifier, HWND hwnd)
{
 HWND hCheckTemp;
 hCheckTemp = CreateWindowEx(
 0,
 "BUTTON",
 tempText,
 WS_CHILD | WS_VISIBLE | BS_AUTOCHECKBOX,
 x, y,
 width, height,
 hwnd, (HMENU)identifier, hInstance, NULL);
 return hCheckTemp;
}
// The window procedure
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
 // Control handles
 static HWND hwndEdit;
 static HWND hwndStatic;
 static HWND hwndButton;
 static HWND hwndCheck;
 switch (message)
 {
   case WM_CREATE:
    // Creates a static text box
    hwndStatic = CreateStatic("Enter text!", 10, 10, 75, 20, IDC_STATIC, hwnd);
    SetDefaultFont(IDC_STATIC, hwnd);
    // Creates a textarea with the text "Hello" in it
    hwndEdit = CreateEdit("Hello", 10, 30, 200, 20, IDC_EDIT, hwnd);
    SetDefaultFont(IDC_EDIT, hwnd);
    // Creates a button labeled "Click me!"
    hwndButton = CreateButton("Click me!", 10, 55, 100, 25, IDC_BUTTON, hwnd);
    SetDefaultFont(IDC_BUTTON, hwnd);
    // Creates a checkbox
    hwndCheck = CreateCheck("Delete text?", 130, 60, 75, 20, IDC_CHECK, hwnd);
    SetDefaultFont(IDC_CHECK, hwnd);
   break;
   case WM_COMMAND:
    // If a button is clicked...
    if(HIWORD(wParam) == BN_CLICKED)
    {
     switch(LOWORD(wParam))
     {
      // ...And the button is the one with the identifier IDC_BUTTON...
      case IDC_BUTTON:
       int tempEditLength = GetWindowTextLength(hwndEdit);
       char tempEditText[tempEditLength + 1];
       LRESULT checkState;
       // ...Then get the text from the textarea...
       GetWindowText(hwndEdit, tempEditText, tempEditLength + 1);
       tempEditText[tempEditLength] = '\0';
       // ...And display a messagebox with the text in it!
       MessageBox(hwnd, tempEditText, "The text entered is:", MB_OK);
       // Check the checkbox...
       checkState = SendDlgItemMessage(
       hwnd,
       IDC_CHECK,
       BM_GETCHECK,
       0, 0);
       // ...And if it's checked...
       if(checkState == BST_CHECKED)
       {
        // ...Empty the textarea!
        SetWindowText(hwndEdit, "");
       }
      break;
     }
    }
   break;
   case WM_DESTROY:
   PostQuitMessage(0);
   break;
   default:
   return DefWindowProc(hwnd, message, wParam, lParam);
 }
 return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszArgument, int nFunsterStil)
{
 HWND hwnd;
 MSG messages;
 WNDCLASSEX wincl;
 wincl.hInstance = hInstance;
 wincl.lpszClassName = szClassName;
 wincl.lpfnWndProc = WindowProcedure;
 wincl.style = CS_DBLCLKS;
 wincl.cbSize = sizeof(WNDCLASSEX);
 wincl.hIcon = LoadIcon(NULL, IDI_APPLICATION);
 wincl.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
 wincl.hCursor = LoadCursor(NULL, IDC_ARROW);
 wincl.lpszMenuName = NULL;
 wincl.cbClsExtra = 0;
 wincl.cbWndExtra = 0;
 wincl.hbrBackground = (HBRUSH) GetStockObject(LTGRAY_BRUSH);
 if(!RegisterClassEx(&wincl)) return 0;
 hwnd = CreateWindowEx(
   0,
   szClassName,
   "Control-classes",
   WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX,
   CW_USEDEFAULT,
   CW_USEDEFAULT,
   250,
   120,
   HWND_DESKTOP,
   NULL,
   hInstance,
   NULL
   );
 ShowWindow(hwnd, nFunsterStil);
 while(GetMessage(&messages, NULL, 0, 0))
 {
   TranslateMessage(&messages);
   DispatchMessage(&messages);
 }
 return messages.wParam;
}