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How to Create a Button

  • Artikkeli

To create buttons dynamically, you use the CreateWindow or CreateWindowEx function. This topic demonstrates how to use the CreateWindow function to create a default push button.

What you need to know

Technologies

Prerequisites

  • C/C++
  • Windows User Interface Programming

Instructions

Use the CreateWindow function to create a button control.

In the following C++ example, the m_hwnd parameter is the handle to the parent window. The BS_DEFPUSHBUTTON style specifies that a default push button should be created. Note that the size and position values must be specified because using CW_USEDEFAULT for a button sets the values to zero.

HWND hwndButton = CreateWindow( 
    L"BUTTON",  // Predefined class; Unicode assumed 
    L"OK",      // Button text 
    WS_TABSTOP | WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,  // Styles 
    10,         // x position 
    10,         // y position 
    100,        // Button width
    100,        // Button height
    m_hwnd,     // Parent window
    NULL,       // No menu.
    (HINSTANCE)GetWindowLongPtr(m_hwnd, GWLP_HINSTANCE), 
    NULL);      // Pointer not needed.

About Buttons

Button Control Reference

Using Buttons

Button