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Rob  
#1 Posted : Monday, June 17, 2019 2:18:57 PM(UTC)
Rob

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Starting with version 0.3.1.3, StrokesPlus.net accepts receiving a WM_COPYDATA message to execute scripts via another program.
(Note: In version 0.3.1.4, the WParam parameter can be sent as 0 (zero, default) to signal the script string is Unicode, send 1 (one) to signal the script string is ANSI.)

This is a very specific use case that 99% of people will never need, but it was fairly easy to add, so why not!

NOTE:
If StrokesPlus.net is running elevated (installer version or portable running as Administrator), a non-elevated process cannot send messages to a higher privilege process.

Also, the script executes with no context, just like a hotkey. Meaning there's no action object available in the script, since it's not being started from an action.

These scripts will be run even is StrokesPlus.net is not active (disabled); as long as S+.net is running (and a script engine is available), it will execute the script.

Here's is example C# code that has all of the code necessary to send the message:

Code:
public void SendScript(string script)
{
	IntPtr hWnd = FindWindowEx(IntPtr.Zero, IntPtr.Zero, null, "StrokesPlus.net Gesture Surface");
	byte[] sarr = System.Text.Encoding.Unicode.GetBytes(script);
	int len = sarr.Length;
	COPYDATASTRUCT cds;
	cds.dwData = (IntPtr)100; //100 (hex 0x64) instructs S+ that you're sending a script
	cds.lpData = script; //String is assumed to be Unicode, not ANSI
	cds.cbData = len + 1;
	SendMessage(hWnd, WM_COPYDATA, IntPtr.Zero, ref cds);
}
public const int WM_COPYDATA = 0x4A;
public struct COPYDATASTRUCT
{
	public IntPtr dwData;
	public int cbData;
	[System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
	public string lpData;
}
[System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);
[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Unicode, SetLastError = false)]
internal static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, ref COPYDATASTRUCT lParam);



Then you can just call:
Code:
SendScript("sp.MessageBox('Hi from WM_COPYDATA!', 'WM_COPYDATA');");

Edited by user Monday, June 17, 2019 6:06:20 PM(UTC)  | Reason: Not specified

thanks 1 user thanked Rob for this useful post.
plunt on 6/17/2019(UTC)
Rob  
#2 Posted : Monday, June 17, 2019 2:27:59 PM(UTC)
Rob

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Here's an example C# project which sends a script to StrokesPlus.net for execution.

https://www.strokesplus.net/files/SendMessage.zip

SendMessage\bin\Debug\SendMessage.exe is already in the download as well, so you don't need to build to try it out.

NOTE: If StrokesPlus.net is running elevated (installer version or portable running as Administrator), a non-elevated process cannot send messages to a higher privilege process.

You'll need to either run Visual Studio as Administrator, or build and right-click the SendMessage.exe and Run as Administrator or nothing will happen.

Edited by user Monday, June 17, 2019 4:51:58 PM(UTC)  | Reason: Not specified

plunt  
#3 Posted : Monday, June 17, 2019 4:51:48 PM(UTC)
plunt

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When i try to send a message with a old x32 ansi app
Code:
SendCopyData("StrokesPlus.net Gesture Surface", 0x64, "sp.MessageBox('Hi from WM_COPYDATA!', 'WM_COPYDATA');")

i get this error:
Quote:
Script execution failed.
SyntaxError: Invalid or unexpected token
at Script Document:1:7 -> ??????????????????????????;

UserPostedImage
if it is due to unicode problems is it possible to modify StrokesPlus to accept also ansi?

Edited by user Monday, June 17, 2019 4:53:02 PM(UTC)  | Reason: Not specified

Rob  
#4 Posted : Monday, June 17, 2019 5:02:59 PM(UTC)
Rob

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Go to the download page https://www.strokesplus.net/Downloads

Scroll down to Previous Versions, enter 0.3.1.4 and download the installer or portable (whichever you used).

Then for WParam, 0 == Unicode, 1 == ANSI

Try it and see if it works.
plunt  
#5 Posted : Monday, June 17, 2019 5:31:59 PM(UTC)
plunt

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It work fine now!
ty :-)
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