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 DLLStructCreateUnion(  )

=== Description === Creates a C/C++ style structure (Union) to be used with DLLCall This is just a simple wrapper for DLLStru..."

2013-10-01T13:56:21Z

Created page with "<pre> DLLStructCreateUnion( <def string> ) </pre> === Description === Creates a C/C++ style structure (Union) to be used with DLLCall This is just a simple wrapper for DLLStru..."

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<pre>
DLLStructCreateUnion( <def string> )
</pre>

=== Description ===

Creates a C/C++ style structure (Union) to be used with DLLCall

This is just a simple wrapper for DLLStructCreate that automatically inserts the union property into your struct by placing "union " before the def string like so DllStructCreate("union int a;float b");

=== Parameters ===

==== def string ====

See [[Core Function DLLStructCreate|DLLStructCreate( )]] for def string.

=== Return Value ===

See [[Core Function DLLStructCreate|DLLStructCreate( )]] for return value.

=== Remarks ===

See [[Core Function DLLStructCreate|DLLStructCreate( )]] for remarks.

=== Example ===

See [[Core Function DLLStructCreate|DLLStructCreate( )]] for more examples.

<syntaxhighlight lang="sputnik">
# A union will place all the objects at the same address
$a = DLLStructCreateUnion("int a;float b");

# so when we set the floats value it also set the ints value
DLLStructSetData($a,"b", 133.77);

# Its size is 4 since they are both at the same offset
say "Size: " . DLLStructGetSize( $a );

# Lets read the int value as a hex and it will give us the floats
# value as a hex (since we wrote to the float which also set the int)
$value = DllStructGetData($a,"a");
printf( "Value is %#x\n", $value );

# Prints
# Size: 4
# Value is 0x4305c51f
</syntaxhighlight>

[[Category:Core Function]]

Core Function DLLStructCreateUnion - Revision history

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UberFoX: Created page with "
DLLStructCreateUnion( )
=== Description === Creates a C/C++ style structure (Union) to be used with DLLCall This is just a simple wrapper for DLLStru..."