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# CIV. W32api functions

# Introduction

This extension is a generic extension API to DLLs. This was originally written to allow access to the Win32 API from PHP, although you can also access other functions exported via other DLLs.

Currently supported types are generic PHP types (strings, booleans, floats, integers and nulls) and types you define with w32api_deftype().

Warning
This extension is EXPERIMENTAL. The behaviour of this extension -- including the names of its functions and anything else documented about this extension -- may change without notice in a future release of PHP. Use this extension at your own risk.

# Requirements

This extension will only work on Windows systems.

# Installation

There is no installation needed to use these functions; they are part of the PHP core.

# Runtime Configuration

This extension has no configuration directives defined in `php.ini`.

# Resource Types

This extension defines one resource type, used for user defined types. The name of this resource is `"dynaparm"`.

# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

`DC_MICROSOFT` (integer)

`DC_BORLAND` (integer)

`DC_CALL_CDECL` (integer)

`DC_CALL_STD` (integer)

`DC_RETVAL_MATH4` (integer)

`DC_RETVAL_MATH8` (integer)

`DC_CALL_STD_BO` (integer)

`DC_CALL_STD_MS` (integer)

`DC_CALL_STD_M8` (integer)

`DC_FLAG_ARGPTR` (integer)

# Examples

This example gets the amount of time the system has been running and displays it in a message box.

Example 1. Get the uptime and display it in a message box
    <?php
    // Define constants needed, taken from
    // Visual Studio/Tools/Winapi/WIN32API.txt
    define("MB_OK", 0);

    // Load the extension in
    dl("php_w32api.dll");

    // Register the GetTickCount function from kernel32.dll
    w32api_register_function("kernel32.dll",
                             "GetTickCount",
                             "long");

    // Register the MessageBoxA function from User32.dll
    w32api_register_function("User32.dll",
                             "MessageBoxA",
                             "long");

    // Get uptime information
    $ticks = GetTickCount();

    // Convert it to a nicely displayable text
    $secs  = floor($ticks / 1000);
    $mins  = floor($secs / 60);
    $hours = floor($mins / 60);

    $str = sprintf("You have been using your computer for:".
                    "\r\n %d Milliseconds, or \r\n %d Seconds".
                    "or \r\n %d mins or\r\n %d hours %d mins.",
                    $ticks,
                    $secs,
                    $mins,
                    $hours,
                    $mins - ($hours*60));

    // Display a message box with only an OK button and the uptime text
    MessageBoxA(NULL,
                $str,
                "Uptime Information",
                MB_OK);
    ?>

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