diff --git a/BizHawk.MultiClient/BizHawk.MultiClient.csproj b/BizHawk.MultiClient/BizHawk.MultiClient.csproj
index 629a487558..ca0a3ef6f9 100644
--- a/BizHawk.MultiClient/BizHawk.MultiClient.csproj
+++ b/BizHawk.MultiClient/BizHawk.MultiClient.csproj
@@ -335,6 +335,9 @@
     <Compile Include="tools\LuaButton.cs">
       <SubType>Component</SubType>
     </Compile>
+    <Compile Include="tools\LuaTextBox.cs">
+      <SubType>Component</SubType>
+    </Compile>
     <Compile Include="tools\LuaWinform.cs">
       <SubType>Form</SubType>
     </Compile>
diff --git a/BizHawk.MultiClient/LuaImplementation.cs b/BizHawk.MultiClient/LuaImplementation.cs
index c319d6a8f1..906325b995 100644
--- a/BizHawk.MultiClient/LuaImplementation.cs
+++ b/BizHawk.MultiClient/LuaImplementation.cs
@@ -1798,7 +1798,7 @@ namespace BizHawk.MultiClient
 			return (int)label.Handle;
 		}
 
-		public int forms_textbox(object form_handle, object caption = null, object width = null, object height = null, object X = null, object Y = null)
+		public int forms_textbox(object form_handle, object caption = null, object width = null, object height = null, object boxtype = null, object X = null, object Y = null)
 		{
 			LuaWinform form = GetForm(form_handle);
 			if (form == null)
@@ -1806,10 +1806,30 @@ namespace BizHawk.MultiClient
 				return 0;
 			}
 
-			TextBox textbox = new TextBox();
+			LuaTextBox textbox = new LuaTextBox();
 			SetText(textbox, caption);
 			SetLocation(textbox, X, Y);
 			SetSize(textbox, X, Y);
+			if (boxtype != null)
+			{
+				switch (boxtype.ToString().ToUpper())
+				{
+					case "HEX":
+					case "HEXADECIMAL":
+						textbox.SetType(BoxType.HEX);
+						break;
+					case "UNSIGNED":
+					case "UINT":
+						textbox.SetType(BoxType.UNSIGNED);
+						break;
+					case "NUMBER":
+					case "NUM":
+					case "SIGNED":
+					case "INT":
+						textbox.SetType(BoxType.SIGNED);
+						break;
+				}
+			}
 			form.Controls.Add(textbox);
 			return (int)textbox.Handle;
 		}
diff --git a/BizHawk.MultiClient/tools/LuaTextBox.cs b/BizHawk.MultiClient/tools/LuaTextBox.cs
new file mode 100644
index 0000000000..f5294bd158
--- /dev/null
+++ b/BizHawk.MultiClient/tools/LuaTextBox.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Forms;
+
+namespace BizHawk.MultiClient.tools
+{
+	enum BoxType { ALL, SIGNED, UNSIGNED, HEX };
+	class LuaTextBox : TextBox
+	{
+		private BoxType boxType = BoxType.ALL;
+
+		public void SetType(BoxType type)
+		{
+			boxType = type;
+			if (type != BoxType.ALL)
+			{
+				CharacterCasing = CharacterCasing.Upper;
+			}
+			else
+			{
+				CharacterCasing = CharacterCasing.Normal;
+			}
+		}
+
+		protected override void OnKeyPress(KeyPressEventArgs e)
+		{
+			SpecificValueBox_KeyPress(this, e);
+			base.OnKeyPress(e);
+		}
+
+		private void SpecificValueBox_KeyPress(object sender, KeyPressEventArgs e)
+		{
+			if (e.KeyChar == '\b') return;
+
+			switch (boxType)
+			{
+				case BoxType.UNSIGNED:
+					if (!InputValidate.IsValidUnsignedNumber(e.KeyChar))
+						e.Handled = true;
+					break;
+				case BoxType.SIGNED:
+					if (!InputValidate.IsValidSignedNumber(e.KeyChar))
+						e.Handled = true;
+					break;
+				case BoxType.HEX:
+					if (!InputValidate.IsValidHexNumber(e.KeyChar))
+						e.Handled = true;
+					break;
+			}
+		}
+	}
+}