diff --git a/rtl/win16/winprocsh.inc b/rtl/win16/winprocsh.inc
index 3c624bb841..f9b733e388 100644
--- a/rtl/win16/winprocsh.inc
+++ b/rtl/win16/winprocsh.inc
@@ -1160,3 +1160,55 @@ function TranslateMDISysAccel(hwndClient: HWND; var msg: MSG): BOOL; external 'U
 {$endif}
 
 function ArrangeIconicWindows(hwnd: HWND): UINT; external 'USER';
+
+{ Dialog and Control Management }
+
+function IsDialogMessage(hwndDlg: HWND; lpmsg: LPMSG): BOOL; external 'USER';
+{$ifdef VAR_PARAMS_ARE_FAR}
+function IsDialogMessage(hwndDlg: HWND; var msg: MSG): BOOL; external 'USER';
+{$endif}
+
+function DefDlgProc(hwndDlg: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; external 'USER';
+
+function CreateDialog(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: DLGPROC): HWND; external 'USER';
+function CreateDialog(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: TFarProc): HWND; external 'USER';
+function CreateDialogIndirect(hinst: HINST; lpvDlgTmp: FarPointer; hwndOwner: HWND; dlgprc: DLGPROC): HWND; external 'USER';
+function CreateDialogIndirect(hinst: HINST; lpvDlgTmp: FarPointer; hwndOwner: HWND; dlgprc: TFarProc): HWND; external 'USER';
+function CreateDialogParam(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: DLGPROC; lParamInit: LPARAM): HWND; external 'USER';
+function CreateDialogParam(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: TFarProc; lParamInit: LPARAM): HWND; external 'USER';
+function CreateDialogIndirectParam(hinst: HINST; lpvDlgTmp: FarPointer; hwndOwner: HWND; dlgprc: DLGPROC; lParamInit: LPARAM): HWND; external 'USER';
+function CreateDialogIndirectParam(hinst: HINST; lpvDlgTmp: FarPointer; hwndOwner: HWND; dlgprc: TFarProc; lParamInit: LPARAM): HWND; external 'USER';
+
+function DialogBox(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: DLGPROC): SmallInt; external 'USER';
+function DialogBox(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: TFarProc): SmallInt; external 'USER';
+function DialogBoxIndirect(hinst: HINST; hglbDlgTemp: HGLOBAL; hwndOwner: HWND; dlgprc: DLGPROC): SmallInt; external 'USER';
+function DialogBoxIndirect(hinst: HINST; hglbDlgTemp: HGLOBAL; hwndOwner: HWND; dlgprc: TFarProc): SmallInt; external 'USER';
+function DialogBoxParam(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: DLGPROC; lParamInit: LPARAM): SmallInt; external 'USER';
+function DialogBoxParam(hinst: HINST; lpszDlgTemp: LPCSTR; hwndOwner: HWND; dlgprc: TFarProc; lParamInit: LPARAM): SmallInt; external 'USER';
+function DialogBoxIndirectParam(hinst: HINST; hglbDlgTemp: HGLOBAL; hwndOwner: HWND; dlgprc: DLGPROC; lParamInit: LPARAM): SmallInt; external 'USER';
+function DialogBoxIndirectParam(hinst: HINST; hglbDlgTemp: HGLOBAL; hwndOwner: HWND; dlgprc: TFarProc; lParamInit: LPARAM): SmallInt; external 'USER';
+
+procedure EndDialog(hwndDlg: HWND; nResult: SmallInt); external 'USER';
+
+function GetDlgCtrlID(hwnd: HWND): SmallInt; external 'USER';
+function GetDlgItem(hwndDlg: HWND; idControl: SmallInt): HWND; external 'USER';
+function SendDlgItemMessage(hwndDlg: HWND; idDlgItem: SmallInt; uMsg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; external 'USER';
+
+procedure SetDlgItemInt(hwndDlg: HWND; idControl: SmallInt; uValue: UINT; fSigned: BOOL); external 'USER';
+function GetDlgItemInt(hwndDlg: HWND; idControl: SmallInt; lpfTranslated: LPBOOL; fSigned: BOOL): UINT; external 'USER';
+
+procedure SetDlgItemText(hwndDlg: HWND; idControl: SmallInt; lpsz: LPCSTR); external 'USER';
+function GetDlgItemText(hwndDlg: HWND; idControl: SmallInt; lpsz: LPSTR; cbMax: SmallInt): SmallInt; external 'USER';
+
+procedure CheckDlgButton(hwndDlg: HWND; idButton: SmallInt; uCheck: UINT); external 'USER';
+procedure CheckRadioButton(hwndDlg: HWND; idFirstButton, idLastButton, idCheckButton: SmallInt); external 'USER';
+function IsDlgButtonChecked(hwndDlg: HWND; idButton: SmallInt): UINT; external 'USER';
+
+function GetNextDlgGroupItem(hwndDlg, hwndCtrl: HWND; fPrevious: BOOL): HWND; external 'USER';
+function GetNextDlgTabItem(hwndDlg, hwndCtrl: HWND; fPrevious: BOOL): HWND; external 'USER';
+
+procedure MapDialogRect(hwndDlg: HWND; lprc: LPRECT); external 'USER';
+{$ifdef VAR_PARAMS_ARE_FAR}
+procedure MapDialogRect(hwndDlg: HWND; var rc: RECT); external 'USER';
+{$endif}
+function GetDialogBaseUnits: DWORD; external 'USER';
diff --git a/rtl/win16/wintypes.inc b/rtl/win16/wintypes.inc
index 53714be91c..940be11957 100644
--- a/rtl/win16/wintypes.inc
+++ b/rtl/win16/wintypes.inc
@@ -39,6 +39,9 @@ type
   { PDWORD is already defined in system }
   LPDWORD = ^DWORD; far;
   
+  PBOOL = ^BOOL;
+  LPBOOL = ^BOOL; far;
+  
   LPVOID = FarPointer;
   
   FARPROC = FarPointer;
@@ -2208,3 +2211,81 @@ type
 
 const
   WM_CHILDACTIVATE  = $0022;
+
+{ Dialog and Control Management }
+
+{ Dialog window class }
+  WC_DIALOG = MAKEINTATOM($8002);
+
+{ cbWndExtra bytes needed by dialog manager for dialog classes }
+  DLGWINDOWEXTRA = 30;
+
+{ Dialog styles }
+  DS_ABSALIGN          = $01;
+  DS_SYSMODAL          = $02;
+  DS_LOCALEDIT         = $20;
+  DS_SETFONT           = $40;
+  DS_MODALFRAME        = $80;
+  DS_NOIDLEMSG         = $100;
+
+{ Dialog messages }
+  DM_GETDEFID          = (WM_USER+0);
+  DM_SETDEFID          = (WM_USER+1);
+
+{ Returned in HIWORD() of DM_GETDEFID result if msg is supported }
+  DC_HASDEFID          = $534B;
+
+{ Dialog notification messages }
+  WM_INITDIALOG        = $0110;
+  WM_NEXTDLGCTL        = $0028;
+
+  WM_PARENTNOTIFY      = $0210;
+
+  WM_ENTERIDLE         = $0121;
+
+type
+  DLGPROC = function(hwndDlg: HWND; msg: UINT; wParam: WPARAM; lParam: LPARAM): BOOL; far;
+
+const
+{ Get/SetWindowWord/Long offsets for use with WC_DIALOG windows }
+  DWL_MSGRESULT        = 0;
+  DWL_DLGPROC          = 4;
+  DWL_USER             = 8;
+
+  WM_GETDLGCODE        = $0087;
+
+{ dialog codes }
+  DLGC_WANTARROWS      = $0001;
+  DLGC_WANTTAB         = $0002;
+  DLGC_WANTALLKEYS     = $0004;
+  DLGC_WANTMESSAGE     = $0004;
+  DLGC_HASSETSEL       = $0008;
+  DLGC_DEFPUSHBUTTON   = $0010;
+  DLGC_UNDEFPUSHBUTTON = $0020;
+  DLGC_RADIOBUTTON     = $0040;
+  DLGC_WANTCHARS       = $0080;
+  DLGC_STATIC          = $0100;
+  DLGC_BUTTON          = $2000;
+
+  WM_CTLCOLOR          = $0019;
+
+{ WM_CTLCOLOR control IDs }
+  CTLCOLOR_MSGBOX      = 0;
+  CTLCOLOR_EDIT        = 1;
+  CTLCOLOR_LISTBOX     = 2;
+  CTLCOLOR_BTN         = 3;
+  CTLCOLOR_DLG         = 4;
+  CTLCOLOR_SCROLLBAR   = 5;
+  CTLCOLOR_STATIC      = 6;
+
+  WM_SETFONT           = $0030;
+  WM_GETFONT           = $0031;
+
+{ Standard dialog button IDs }
+  IDOK                 = 1;
+  IDCANCEL             = 2;
+  IDABORT              = 3;
+  IDRETRY              = 4;
+  IDIGNORE             = 5;
+  IDYES                = 6;
+  IDNO                 = 7;