diff --git a/Contrib/ShowWin/ShowWin.c b/Contrib/ShowWin/ShowWin.c
new file mode 100644
index 00000000..0e4d3fab
--- /dev/null
+++ b/Contrib/ShowWin/ShowWin.c
@@ -0,0 +1,222 @@
+#include <windows.h>
+
+typedef struct _stack_t {
+  struct _stack_t *next;
+  char text[1]; // this should be the length of string_size
+} stack_t;
+
+int popstring(char *str); // 0 on success, 1 on empty stack
+void pushstring(char *str);
+int my_atoi(char *s);
+
+enum
+{
+INST_0,         // $0
+INST_1,         // $1
+INST_2,         // $2
+INST_3,         // $3
+INST_4,         // $4
+INST_5,         // $5
+INST_6,         // $6
+INST_7,         // $7
+INST_8,         // $8
+INST_9,         // $9
+INST_R0,        // $R0
+INST_R1,        // $R1
+INST_R2,        // $R2
+INST_R3,        // $R3
+INST_R4,        // $R4
+INST_R5,        // $R5
+INST_R6,        // $R6
+INST_R7,        // $R7
+INST_R8,        // $R8
+INST_R9,        // $R9
+INST_CMDLINE,   // $CMDLINE
+INST_INSTDIR,   // $INSTDIR
+INST_OUTDIR,    // $OUTDIR
+INST_EXEDIR,    // $EXEDIR
+INST_LANG,      // $LANGUAGE
+__INST_LAST
+};
+
+char *getuservariable(int varnum);
+
+
+HINSTANCE g_hInstance;
+HWND g_hwndParent;
+int g_stringsize;
+stack_t **g_stacktop;
+char *g_variables;
+
+void __declspec(dllexport) Show(HWND hwndParent, int string_size, 
+                                      char *variables, stack_t **stacktop)
+{
+  g_hwndParent=hwndParent;
+  g_stringsize=string_size;
+  g_stacktop=stacktop;
+  g_variables=variables;
+
+  // do your stuff here
+  {
+    HWND hwnd_ctrl;
+    char* str_var;
+    str_var = (char *)GlobalAlloc(GPTR, sizeof(char)*string_size+1);
+    if (!popstring(str_var)) {
+      hwnd_ctrl = (HWND)my_atoi(str_var);
+      if (IsWindow(hwnd_ctrl)) {
+        ShowWindow(hwnd_ctrl,1);
+      } else {
+        pushstring("error");
+      }
+    } else {
+      pushstring("error");
+    }
+  }
+}
+
+void __declspec(dllexport) Hide(HWND hwndParent, int string_size, char *variables, stack_t **stacktop){
+  g_hwndParent=hwndParent;
+  g_stringsize=string_size;
+  g_stacktop=stacktop;
+  g_variables=variables;
+  {
+    HWND hwnd_ctrl;
+    char* str_var;
+    str_var = (char *)GlobalAlloc(GPTR, sizeof(char)*string_size+1);
+    if (!popstring(str_var)) {
+      hwnd_ctrl = (HWND)my_atoi(str_var);
+      if (IsWindow(hwnd_ctrl)) {
+        ShowWindow(hwnd_ctrl,0);
+      } else {
+        pushstring("error");
+      }
+    } else {
+      pushstring("error");
+    }
+  }
+}
+
+void __declspec(dllexport) Enable(HWND hwndParent, int string_size, char *variables, stack_t **stacktop){
+  g_hwndParent=hwndParent;
+  g_stringsize=string_size;
+  g_stacktop=stacktop;
+  g_variables=variables;
+  {
+    HWND hwnd_ctrl;
+    char* str_var;
+    str_var = (char *)GlobalAlloc(GPTR, sizeof(char)*string_size+1);
+    if (!popstring(str_var)) {
+      hwnd_ctrl = (HWND)my_atoi(str_var);
+      if (IsWindow(hwnd_ctrl)) {
+        EnableWindow(hwnd_ctrl,TRUE);
+      } else {
+        pushstring("error");
+      }
+    } else {
+      pushstring("error");
+    }
+  }
+}
+
+void __declspec(dllexport) Disable(HWND hwndParent, int string_size, char *variables, stack_t **stacktop){
+  g_hwndParent=hwndParent;
+  g_stringsize=string_size;
+  g_stacktop=stacktop;
+  g_variables=variables;
+  {
+    HWND hwnd_ctrl;
+    char* str_var;
+    str_var = (char *)GlobalAlloc(GPTR, sizeof(char)*string_size+1);
+    if (!popstring(str_var)) {
+      hwnd_ctrl = (HWND)my_atoi(str_var);
+      if (IsWindow(hwnd_ctrl)) {
+        EnableWindow(hwnd_ctrl,FALSE);
+      } else {
+        pushstring("error");
+      }
+    } else {
+      pushstring("error");
+    }
+  }
+}
+
+BOOL WINAPI _DllMainCRTStartup(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
+{
+  g_hInstance=hInst;
+	return TRUE;
+}
+
+// utility functions (not required but often useful)
+int popstring(char *str)
+{
+  stack_t *th;
+  if (!g_stacktop || !*g_stacktop) return 1;
+  th=(*g_stacktop);
+  lstrcpy(str,th->text);
+  *g_stacktop = th->next;
+  GlobalFree((HGLOBAL)th);
+  return 0;
+}
+
+void pushstring(char *str)
+{
+  stack_t *th;
+  if (!g_stacktop) return;
+  th=(stack_t*)GlobalAlloc(GPTR,sizeof(stack_t)+g_stringsize);
+  lstrcpyn(th->text,str,g_stringsize);
+  th->next=*g_stacktop;
+  *g_stacktop=th;
+}
+
+char *getuservariable(int varnum)
+{
+  if (varnum < 0 || varnum >= __INST_LAST) return NULL;
+  return g_variables+varnum*g_stringsize;
+}
+
+int my_atoi(char *s)
+{
+  unsigned int v=0;
+  if (*s == '0' && (s[1] == 'x' || s[1] == 'X'))
+  {
+    s+=2;
+    for (;;)
+    {
+      int c=*s++;
+      if (c >= '0' && c <= '9') c-='0';
+      else if (c >= 'a' && c <= 'f') c-='a'-10;
+      else if (c >= 'A' && c <= 'F') c-='A'-10;
+      else break;
+      v<<=4;
+      v+=c;
+    }
+  }
+  else if (*s == '0' && s[1] <= '7' && s[1] >= '0')
+  {
+    s++;
+    for (;;)
+    {
+      int c=*s++;
+      if (c >= '0' && c <= '7') c-='0';
+      else break;
+      v<<=3;
+      v+=c;
+    }
+  }
+  else
+  {
+    int sign=0;
+    if (*s == '-') { s++; sign++; }
+    for (;;)
+    {
+      int c=*s++ - '0';
+      if (c < 0 || c > 9) break;
+      v*=10;
+      v+=c;
+    }
+    if (sign) return -(int) v;
+  }
+  return (int)v;
+}
+
+
diff --git a/Contrib/ShowWin/ShowWin.dpr b/Contrib/ShowWin/ShowWin.dpr
new file mode 100644
index 00000000..2fccf576
--- /dev/null
+++ b/Contrib/ShowWin/ShowWin.dpr
@@ -0,0 +1,123 @@
+{
+  NSIS ExDLL example
+  (C) 2001 - Peter Windridge
+
+  Fixed and formatted by Alexander Tereschenko
+  http://futuris.plastiqueweb.com/
+
+  Tested in Delphi 6.01
+}
+
+library exdll;
+
+uses Windows;
+
+type
+  VarConstants = (
+    INST_0,
+    INST_1,       // $1
+    INST_2,       // $2
+    INST_3,       // $3
+    INST_4,       // $4
+    INST_5,       // $5
+    INST_6,       // $6
+    INST_7,       // $7
+    INST_8,       // $8
+    INST_9,       // $9
+    INST_R0,      // $R0
+    INST_R1,      // $R1
+    INST_R2,      // $R2
+    INST_R3,      // $R3
+    INST_R4,      // $R4
+    INST_R5,      // $R5
+    INST_R6,      // $R6
+    INST_R7,      // $R7
+    INST_R8,      // $R8
+    INST_R9,      // $R9
+    INST_CMDLINE, // $CMDLINE
+    INST_INSTDIR, // $INSTDIR
+    INST_OUTDIR,  // $OUTDIR
+    INST_EXEDIR,  // $EXEDIR
+    INST_LANG,    // $LANGUAGE
+    __INST_LAST
+    );
+  TVariableList = INST_0..__INST_LAST;
+  pstack_t = ^stack_t;
+  stack_t = record
+    next: pstack_t;
+    text: PChar;
+  end;
+
+var
+  g_stringsize: integer;
+  g_stacktop: ^pstack_t;
+  g_variables: PChar;
+  g_hwndParent: HWND;
+
+function PopString(str: PChar):integer;
+var
+  th: pstack_t;
+begin
+  if integer(g_stacktop^) = 0 then
+    begin
+    Result:=1;
+    Exit;
+    end;
+  th:=g_stacktop^;
+  lstrcpy(str,@th.text);
+  g_stacktop^ := th.next;
+  GlobalFree(HGLOBAL(th));
+  Result:=0;
+end;
+
+function PushString(str: PChar):integer;
+var
+  th: pstack_t;
+begin
+  if integer(g_stacktop) = 0 then
+    begin
+    Result:=1;
+    Exit;
+    end;
+  th:=pstack_t(GlobalAlloc(GPTR,sizeof(stack_t)+g_stringsize));
+  lstrcpyn(@th.text,str,g_stringsize);
+  th.next:=g_stacktop^;
+  g_stacktop^:=th;
+  Result:=0;
+end;
+
+function GetUserVariable(varnum: TVariableList):PChar;
+begin
+  if (integer(varnum) < 0) or (integer(varnum) >= integer(__INST_LAST)) then
+    begin
+    Result:='';
+    Exit;
+    end;
+  Result:=g_variables+integer(varnum)*g_stringsize;
+end;
+
+function ex_dll(hwndParent: HWND; string_size: integer; variables: PChar; stacktop: pointer):integer; cdecl;
+var
+  c: PChar;
+  buf: array[0..1024] of char;
+begin
+  // set up global variables
+  g_stringsize:=string_size;
+  g_hwndParent:=hwndParent;
+  g_stringsize:=string_size;
+  g_stacktop:=stacktop;
+  g_variables:=variables;
+
+  c:=GetUserVariable(INST_0);
+  MessageBox(g_hwndParent,c,'The value of $0',MB_OK);
+  PopString(@buf);
+  MessageBox(g_hwndParent,@buf,'pop',MB_OK);
+  PushString(PChar('Hello, this is a push'));
+
+  Result:=1;
+end;
+
+exports ex_dll;
+
+begin
+end.
diff --git a/Contrib/ShowWin/ShowWin.dsp b/Contrib/ShowWin/ShowWin.dsp
new file mode 100644
index 00000000..9ff57e02
--- /dev/null
+++ b/Contrib/ShowWin/ShowWin.dsp
@@ -0,0 +1,107 @@
+# Microsoft Developer Studio Project File - Name="ShowWin" - Package Owner=<4>
+# Microsoft Developer Studio Generated Build File, Format Version 6.00
+# ** DO NOT EDIT **
+
+# TARGTYPE "Win32 (x86) Dynamic-Link Library" 0x0102
+
+CFG=ShowWin - Win32 Debug
+!MESSAGE This is not a valid makefile. To build this project using NMAKE,
+!MESSAGE use the Export Makefile command and run
+!MESSAGE 
+!MESSAGE NMAKE /f "ShowWin.mak".
+!MESSAGE 
+!MESSAGE You can specify a configuration when running NMAKE
+!MESSAGE by defining the macro CFG on the command line. For example:
+!MESSAGE 
+!MESSAGE NMAKE /f "ShowWin.mak" CFG="ShowWin - Win32 Debug"
+!MESSAGE 
+!MESSAGE Possible choices for configuration are:
+!MESSAGE 
+!MESSAGE "ShowWin - Win32 Release" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE "ShowWin - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
+!MESSAGE 
+
+# Begin Project
+# PROP AllowPerConfigDependencies 0
+# PROP Scc_ProjName ""
+# PROP Scc_LocalPath ""
+CPP=cl.exe
+MTL=midl.exe
+RSC=rc.exe
+
+!IF  "$(CFG)" == "ShowWin - Win32 Release"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 0
+# PROP BASE Output_Dir "Release"
+# PROP BASE Intermediate_Dir "Release"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 0
+# PROP Output_Dir "Release"
+# PROP Intermediate_Dir "Release"
+# PROP Ignore_Export_Lib 0
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MT /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "ShowWin_EXPORTS" /YX /FD /c
+# ADD CPP /nologo /MT /W3 /GX /O1 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "ShowWin_EXPORTS" /YX /FD /c
+# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x409 /d "NDEBUG"
+# ADD RSC /l 0x409 /d "NDEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386
+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /entry:"_DllMainCRTStartup" /dll /machine:I386 /nodefaultlib /opt:nowin98
+# SUBTRACT LINK32 /pdb:none
+
+!ELSEIF  "$(CFG)" == "ShowWin - Win32 Debug"
+
+# PROP BASE Use_MFC 0
+# PROP BASE Use_Debug_Libraries 1
+# PROP BASE Output_Dir "Debug"
+# PROP BASE Intermediate_Dir "Debug"
+# PROP BASE Target_Dir ""
+# PROP Use_MFC 0
+# PROP Use_Debug_Libraries 1
+# PROP Output_Dir "Debug"
+# PROP Intermediate_Dir "Debug"
+# PROP Target_Dir ""
+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "ShowWin_EXPORTS" /YX /FD /GZ /c
+# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "ShowWin_EXPORTS" /YX /FD /GZ /c
+# ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
+# ADD BASE RSC /l 0x409 /d "_DEBUG"
+# ADD RSC /l 0x409 /d "_DEBUG"
+BSC32=bscmake.exe
+# ADD BASE BSC32 /nologo
+# ADD BSC32 /nologo
+LINK32=link.exe
+# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept
+# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept
+
+!ENDIF 
+
+# Begin Target
+
+# Name "ShowWin - Win32 Release"
+# Name "ShowWin - Win32 Debug"
+# Begin Group "Source Files"
+
+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"
+# Begin Source File
+
+SOURCE=.\ShowWin.c
+# End Source File
+# End Group
+# Begin Group "Header Files"
+
+# PROP Default_Filter "h;hpp;hxx;hm;inl"
+# End Group
+# Begin Group "Resource Files"
+
+# PROP Default_Filter "ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
+# End Group
+# End Target
+# End Project
diff --git a/Contrib/ShowWin/ShowWin.dsw b/Contrib/ShowWin/ShowWin.dsw
new file mode 100644
index 00000000..510e35ac
--- /dev/null
+++ b/Contrib/ShowWin/ShowWin.dsw
@@ -0,0 +1,29 @@
+Microsoft Developer Studio Workspace File, Format Version 6.00
+# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
+
+###############################################################################
+
+Project: "ShowWin"=.\ShowWin.dsp - Package Owner=<4>
+
+Package=<5>
+{{{
+}}}
+
+Package=<4>
+{{{
+}}}
+
+###############################################################################
+
+Global:
+
+Package=<5>
+{{{
+}}}
+
+Package=<3>
+{{{
+}}}
+
+###############################################################################
+
diff --git a/Contrib/ShowWin/ShowWin.nsi b/Contrib/ShowWin/ShowWin.nsi
new file mode 100644
index 00000000..e87c3023
--- /dev/null
+++ b/Contrib/ShowWin/ShowWin.nsi
@@ -0,0 +1,21 @@
+;ShowWin Example
+
+Name "ShowWin Example"
+OutFile "ShowWin.exe"
+
+LicenseText "Hide Richedit Control and disable the cancel button."
+LicenseData "ShowWin.txt"
+
+Section ""
+SectionEnd
+
+Function .onInitDialog
+  ;hide richedit control
+  FindWindow $R1 "#32770" "" $HWNDPARENT
+  GetDlgItem $R1 $R1 1000
+  ShowWin::Hide $R1
+
+  ;disable the 'I Agree' button
+  GetDlgItem $R1 $HWNDPARENT 1
+  ShowWin::Disable $R1
+FunctionEnd
\ No newline at end of file
diff --git a/Contrib/ShowWin/ShowWin.txt b/Contrib/ShowWin/ShowWin.txt
new file mode 100644
index 00000000..5190702a
--- /dev/null
+++ b/Contrib/ShowWin/ShowWin.txt
@@ -0,0 +1,23 @@
+ShowWin Plugin
+----------------------------------------------------------------------
+
+Description:
+  ShowWin is a small plugin which will allow you to hide, show, enable
+  and disable controls.
+
+Usage:
+  ShowWin::Show hwnd
+  ShowWin::Hide hwnd
+  ShowWin::Enable hwnd
+  ShowWin::Disable hwnd
+
+Example:
+  Hide the version label
+
+  GetDlgItem $R1 $HWNDPARENT 1028
+  ShowWin::Hide $R1
+
+  Also see ShowWin.nsi.
+
+----------------------------------------------------------------------
+Copyright (c) 2002 Don Selkirk
\ No newline at end of file
diff --git a/Plugins/ShowWin.dll b/Plugins/ShowWin.dll
index 9ae89fa5..b5ecf648 100644
Binary files a/Plugins/ShowWin.dll and b/Plugins/ShowWin.dll differ