TrueCrypt

Благодарю за ответ, пытался исходник поредактировать — винда на права доступа ругалась. Сделал так:
unit Forms.Persistent; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, {$IF Defined(WIN32) OR Defined(WIN64)} Winapi.Windows, FMX.Platform.Win, Winapi.Messages, {$ENDIF} FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs; type TfrmPersistent = class(TForm) {$IF Defined(WIN32) OR Defined(WIN64)} private FHwnd: HWND; FOldWndProc: LONG_PTR; protected procedure CreateHandle; override; procedure DestroyHandle; override; {$ENDIF} end; implementation {$R *.fmx} {$IF Defined(WIN32) OR Defined(WIN64)} { TfrmPersistent } procedure TfrmPersistent.CreateHandle; function WindowProc(hwnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall; var frm: TCommonCustomForm; begin frm := FindWindow(hwnd); Assert(frm.InheritsFrom(TfrmPersistent)); if Assigned(frm) then begin if uMsg = WM_GETMINMAXINFO then begin with PMinMaxInfo(LParam)^.ptMinTrackSize, frm do begin X := 950 + Width - ClientWidth; Y := 500 + Height - ClientHeight; end; Result := 0; end else Result := CallWindowProc(Ptr(TfrmPersistent(frm).FOldWndProc), hwnd, uMsg, WParam, lParam); end else Result := DefWindowProc(hwnd, uMsg, wParam, lParam); end; begin inherited CreateHandle; FHwnd := WindowHandleToPlatform(Handle).Wnd; FOldWndProc := GetWindowLongPtr(FHwnd, GWL_WNDPROC); SetWindowLongPtr(FHwnd, GWL_WNDPROC, NativeInt(@WindowProc)); end; procedure TfrmPersistent.DestroyHandle; begin Assert(FHwnd <> 0); SetWindowLongPtr(FHwnd, GWL_WNDPROC, FOldWndProc); inherited DestroyHandle; end; {$ENDIF} end. Может кому пригодится.

Более гибкий вариант, работающий как под х86, так и под х64:
unit Forms.Persistent; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, {$IF Defined(WIN32) OR Defined(WIN64)} System.Generics.Collections, Winapi.Windows, FMX.Platform.Win, Winapi.Messages, {$ENDIF} FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs; type TfrmPersistent = class(TForm) {$IF Defined(WIN32) OR Defined(WIN64)} private class var Callbacks: TDictionary<HWND, Pointer>; class constructor ClassCreate; class destructor ClassDestroy; protected procedure CreateHandle; override; procedure DestroyHandle; override; {$ENDIF} end; implementation {$R *.fmx} {$IF Defined(WIN32) OR Defined(WIN64)} { TfrmPersistent } function WindowProc(hwnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall; var frm: TCommonCustomForm; oldProc: Pointer; begin frm := FindWindow(hwnd); if Assigned(frm) and (uMsg = WM_GETMINMAXINFO) then begin with PMinMaxInfo(LParam)^.ptMinTrackSize, frm do begin X := 950 + Width - ClientWidth; Y := 500 + Height - ClientHeight; end; Result := 0; end else if TfrmPersistent.Callbacks.TryGetValue(hwnd, oldProc) and Assigned(oldProc) then Result := CallWindowProc(oldProc, hwnd, uMsg, wParam, lParam) else Result := DefWindowProc(hwnd, uMsg, wParam, lParam); end; procedure TfrmPersistent.CreateHandle; var wnd: HWND; begin inherited CreateHandle; wnd := FormToHWND(Self); if wnd <> 0 then begin Callbacks.Add(wnd, Ptr(GetWindowLongPtr(wnd, GWLP_WNDPROC))); SetWindowLongPtr(wnd, GWLP_WNDPROC, NativeInt(@WindowProc)); end; end; procedure TfrmPersistent.DestroyHandle; var wnd: HWND; oldProc: Pointer; begin wnd := FormToHWND(Self); if (wnd <> 0) and Callbacks.TryGetValue(wnd, oldProc) then SetWindowLongPtr(wnd, GWLP_WNDPROC, NativeInt(oldProc)); inherited DestroyHandle; end; class constructor TfrmPersistent.ClassCreate; begin Callbacks := TDictionary<HWND, Pointer>.Create; end; class destructor TfrmPersistent.ClassDestroy; begin Callbacks.Free; end; {$ENDIF} end. Похоже, что при компиляции в х64, вложенные процедуры как-то хитро компилируются, в итоге либо кривой стек возникает, либо еще что, поэтому пришлось колбек вынести в глобальный метод.

Благодарю за ответ, пытался исходник поредактировать — винда на права доступа ругалась. Сделал так:
unit Forms.Persistent; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, {$IF Defined(WIN32) OR Defined(WIN64)} Winapi.Windows, FMX.Platform.Win, Winapi.Messages, {$ENDIF} FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs; type TfrmPersistent = class(TForm) {$IF Defined(WIN32) OR Defined(WIN64)} private FHwnd: HWND; FOldWndProc: LONG_PTR; protected procedure CreateHandle; override; procedure DestroyHandle; override; {$ENDIF} end; implementation {$R *.fmx} {$IF Defined(WIN32) OR Defined(WIN64)} { TfrmPersistent } procedure TfrmPersistent.CreateHandle; function WindowProc(hwnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall; var frm: TCommonCustomForm; begin frm := FindWindow(hwnd); Assert(frm.InheritsFrom(TfrmPersistent)); if Assigned(frm) then begin if uMsg = WM_GETMINMAXINFO then begin with PMinMaxInfo(LParam)^.ptMinTrackSize, frm do begin X := 950 + Width - ClientWidth; Y := 500 + Height - ClientHeight; end; Result := 0; end else Result := CallWindowProc(Ptr(TfrmPersistent(frm).FOldWndProc), hwnd, uMsg, WParam, lParam); end else Result := DefWindowProc(hwnd, uMsg, wParam, lParam); end; begin inherited CreateHandle; FHwnd := WindowHandleToPlatform(Handle).Wnd; FOldWndProc := GetWindowLongPtr(FHwnd, GWL_WNDPROC); SetWindowLongPtr(FHwnd, GWL_WNDPROC, NativeInt(@WindowProc)); end; procedure TfrmPersistent.DestroyHandle; begin Assert(FHwnd <> 0); SetWindowLongPtr(FHwnd, GWL_WNDPROC, FOldWndProc); inherited DestroyHandle; end; {$ENDIF} end. Может кому пригодится.

Благодарю за ответ, пытался исходник поредактировать — винда на права доступа ругалась. Сделал так:
unit Forms.Persistent; interface uses System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants, {$IF Defined(WIN32) OR Defined(WIN64)} Winapi.Windows, FMX.Platform.Win, Winapi.Messages, {$ENDIF} FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs; type TfrmPersistent = class(TForm) {$IF Defined(WIN32) OR Defined(WIN64)} private FHwnd: HWND; FOldWndProc: LONG_PTR; protected procedure CreateHandle; override; procedure DestroyHandle; override; {$ENDIF} end; implementation {$R *.fmx} {$IF Defined(WIN32) OR Defined(WIN64)} { TfrmPersistent } procedure TfrmPersistent.CreateHandle; function WindowProc(hwnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall; var frm: TCommonCustomForm; begin frm := FindWindow(hwnd); Assert(frm.InheritsFrom(TfrmPersistent)); if Assigned(frm) then begin if uMsg = WM_GETMINMAXINFO then begin with PMinMaxInfo(LParam)^.ptMinTrackSize, frm do begin X := 950 + Width - ClientWidth; Y := 500 + Height - ClientHeight; end; Result := 0; end else Result := CallWindowProc(Ptr(TfrmPersistent(frm).FOldWndProc), hwnd, uMsg, WParam, lParam); end else Result := DefWindowProc(hwnd, uMsg, wParam, lParam); end; begin inherited CreateHandle; FHwnd := WindowHandleToPlatform(Handle).Wnd; FOldWndProc := GetWindowLongPtr(FHwnd, GWL_WNDPROC); SetWindowLongPtr(FHwnd, GWL_WNDPROC, NativeInt(@WindowProc)); end; procedure TfrmPersistent.DestroyHandle; begin Assert(FHwnd <> 0); SetWindowLongPtr(FHwnd, GWL_WNDPROC, FOldWndProc); inherited DestroyHandle; end; {$ENDIF} end. Может кому пригодится.