PlugIn Development:GameEx Event CommandLine Function

This function is called when GameEx populates the command line for the chosen game.

Parameters

InfoPtr [IntPtr]: An array of game data, which should be pushed to the GameInfo structure using a DirectCast.

Parameter Values

The InfoPtr passed to this variable populates the GameInfo structure when passed via DirectCast like so:
VB.NET: Dim Info As Game_Info = DirectCast(Marshal.PtrToStructure(InfoPtr, GetType(Game_Info)), Game_Info)
C#: Game_Info Info = (Game_Info)Marshal.PtrToStructure(InfoPtr, typeof(Game_Info));

Returns

This function returns a string value.

Return Values

Return your modified CmdLine string and GameEx will use the new command line when it runs the game.
Alternatively, you can return Nothing and GameEx will process the currently configured command line.

Structures

The structures below outline the the data passed in the PlugIn.dll file.

VB.NET

Game Info Structure

<StructLayout(LayoutKind.Sequential)> _
Public Structure Game_Info
     Public EmulatorNumber As Integer
     Public EmulatorName As String
     Public GameName As String
     Public ROMPath As String
     Public ROMName As String
     Public GameData As Database
     Public MameInfo As Mame_Info
     Public RomFilter As String
     Public SnapPath As String
     Public VideoPath As String
     Public TitlePath As String
     Public CmdLine As String
End Structure

Mame Info Structure

<StructLayout(LayoutKind.Sequential)> _
Public Structure Mame_Info
     Public Players As String
     Public Control As String
     Public CloneOf As String
     Public Orientation As String
     Public VideoWidth As Integer
     Public VideoHeight As Integer
     Public Cocktail As Boolean
End Structure

Database Structure

<StructLayout(LayoutKind.Sequential)> _
Public Structure Database
     Public Category As String
     Public Year As String
     Public Developer As String
     Public Publisher As String
     Public Description As String
     Public SystemBiography As String
End Structure

C#

Game Info Structure

[ StructLayout( LayoutKind.Sequential )]
public struct Game_Info
{
     public int EmulatorNumber; 
     public string EmulatorName;
     public string GameName;
     public string ROMPath;
     public string ROMName;
     public Database GameData;
     public Mame_Info MameInfo;
     public string ROMFilter;
     public string SnapPath;
     public string VideoPath;
     public string TitlePath;
     public string CMDLine;
};

Mame Info Structure

[ StructLayout( LayoutKind.Sequential )]
public struct Mame_Info
{
     public string Players;
     public string Control;
     public string CloneOf;
     public string Orientation;
     public int VideoWidth;
     public int VideoHeight;
     public bool Cocktail;
};

Database Structure

[ StructLayout( LayoutKind.Sequential )]
public struct Database
{
     public string Category;
     public string Year;
     public string Developer;
     public string Publisher;
     public string Description;
     public string SystemBiography;
};

Code Examples

VB.NET

Public Function Event_CommandLine(ByVal InfoPtr As IntPtr) As String
     Dim Info As Game_Info = CType(Marshal.PtrToStructure(InfoPtr, GetType(Game_Info)), Game_Info)
     'Access the Game_Info Structure:
     Dim CmdLine As String = Info.CmdLine
     'Access the Mame_Info Structure:
     Dim CloneOf As String = Info.MameInfo.CloneOf
     'Access the Database Structure:
     Dim Dev As String = Info.GameData.Developer
       'Run some code here!
     Return CmdLine
End Function

C#

public string Event_CommandLine(IntPtr InfoPtr)
{
     Game_Info Info = (Game_Info)Marshal.PtrToStructure(InfoPtr, typeof(Game_Info));
     //Access the Game_Info Structure:
     string CmdLine = Info.CMDLine;
     //Access the Mame_Info Structure:
     string CloneOf = Info.MameInfo.CloneOf;
     //Access the Database Structure:
     string Dev = Info.GameData.Developer;
       //Run some code here!
     return CmdLine;
}