Core Function DLLImport as Array

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DLLImport( <array> )

Contents

Description

See DLLImport( <varies...> ) for description

Parameters

array

The array must appear as so: 

array(
	'MyDLL.dll" // This part is optional
	array('user32.dll', 'MessageBox', 'Int32', 'ippi', 'Ansi'),
);
  1. First there is the array itself.
  1. Second there is the optional "MyDLL.dll" to define a DLL to save the import as.

You can tell it to save the source code by adding : and a file name to the DLL example:

"MyDLL.dll:Source.cs"

The source is in C#

This parameter is optional so if you don't include the DLL name the DLLImport will just directly import these functions into your program instantly.

If you do include the DLL name then the functions will NOT be imported into your program instantly instead it will create a DLL file for you to use and you must import that file like so: 

DLLImport("MyDLL.dll"); // You can import this DLL after you have compiled it

The benefit of compiling a DLL and importing that directly it saves having to recompile everything every time you call the function (Using the DLL is 10000x faster than regenerating all the calling code every time).

When you choose to import a DLL you created you can choose to only include it ONCE using the : for example: 

DLLImport("MyDLL.dll:once");
// Now this DLL can only be include ONCE in your program
// and any attempts to include it again will be rejected
// since it is already included and working

You can also add additional strings to do special tasks when creating a DLL or just importing functions for example: 

DLLImport(
array(
	'MyDLL.dll"
	'@AddBefore:c_" // causes c_ to get added before the Function names after creation
	array('user32.dll', 'MessageBox', 'Int32', 'ippi', 'Ansi'),
	// Normally the "MessageBox" imported would be called like so:
	MessageBox(0, "Test", "Test", 0); // HOWEVER since we added @AddBefore the name has changed to:
	c_MessageBox(0, "Test", "Test", 0); // We can use this to add stuff like wapi_ etc etc.
)
);

'@AddBefore:c_" is a good way to modify the name of the imported files you can also use '@AddAfter:c_".

  1. Third you define additional arrays PER function you wish to import for example 
array('user32.dll', 'MessageBox', 'Int32', 'ippi', 'Ansi')

In the above example the DLL name is 'user32.dll' its importing the function 'MessageBox' the return value is expected to be an 'Int32' and the parameters are 'ippi' meaning Int32, String, String, Int32 finally the strings are going to passed the functiyon as 'Ansi' (you could of course use 'Unicode' etc)

You can import many functions at once

For detailed information on the parameter options you can use to create this: 

array('user32.dll', 'MessageBox', 'Int32', 'ippi', 'Ansi')

Click HERE

Return Value

See DLLImport( <varies...> ) for return value

Remarks

None.

Example

Example of a DLL creation 

DllImport(
			array
			(
				'@AddBefore:w_', // Makes the APIs start with w_ so MessageBox = w_MessageBox
				'API.dll:API_DLL_Source.cs', // Tells it to produce a DLL and the Source code to it
				//'API.dll', // Tells it to produce only the dll
				// User32.dll
				array('User32.dll', 'MessageBox', 'Int32', 'ippi', 'Unicode'),
				array('User32.dll', 'GetMessageExtraInfo', 'Int32', '', ''),
				array('User32.dll', 'MapVirtualKey', 'UInt32', 'II', ''),
				array('User32.dll', 'keybd_event', '', 'bbIi', ''),
				array('User32.dll', 'VkKeyScan', 'Int16', 's', ''),
				array('User32.dll', 'SendInput', 'UInt32', 'Iti', ''),
				array('User32.dll', 'GetAsyncKeyState', 'Int16', 'I', ''),
				array('User32.dll', 'GetKeyState', 'Int16', 'I', ''),
				// Kernel32.dll
				array('Kernel32.dll', 'GetTickCount', 'Int32', '', ''),
				array('Kernel32.dll', 'GetTickCount64', 'Int64', '', '')
			)
);

Example of using the DLL (made in previous example) 

DLLImport('API.dll');
// Setup a few variables
$MB_YESNO = 0x04;
$MB_ICONINFORMATION = 0x40;
$IDYES = 6;
// Make the call
$RetVal = w_MessageBox(0, "Hello There", "Title", $MB_YESNO | $MB_ICONINFORMATION);
If ( $RetVal == $IDYES )
{
	println("YES was pressed");
}
else
{
	println("NO was pressed");
}

Example of importing and using functions directly 

DllImport(
			array
			(
				'@AddBefore:w_', // Makes the APIs start with w_ so MessageBox = w_MessageBox
				// User32.dll
				array('User32.dll', 'MessageBox', 'Int32', 'ippi', 'Unicode'),
				array('User32.dll', 'GetMessageExtraInfo', 'Int32', '', ''),
				array('User32.dll', 'MapVirtualKey', 'UInt32', 'II', ''),
				array('User32.dll', 'keybd_event', '', 'bbIi', ''),
				array('User32.dll', 'VkKeyScan', 'Int16', 's', ''),
				array('User32.dll', 'SendInput', 'UInt32', 'Iti', ''),
				array('User32.dll', 'GetAsyncKeyState', 'Int16', 'I', ''),
				array('User32.dll', 'GetKeyState', 'Int16', 'I', ''),
				// Kernel32.dll
				array('Kernel32.dll', 'GetTickCount', 'Int32', '', ''),
				array('Kernel32.dll', 'GetTickCount64', 'Int64', '', '')
			)
);
// Setup a few variables
$MB_YESNO = 0x04;
$MB_ICONINFORMATION = 0x40;
$IDYES = 6;
// Make the call
$RetVal = w_MessageBox(0, "Hello There", "Title", $MB_YESNO | $MB_ICONINFORMATION);
If ( $RetVal == $IDYES )
{
	println("YES was pressed");
}
else
{
	println("NO was pressed");
}
Retrieved from "http://ubersoft.org/Sputnik/wiki/index.php/Core_Function_DLLImport_as_Array"
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