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| program Project1;
{ Standard Windows API application written in Object Pascal.
No VCL code included. This is all done on the Windows API level.
Note that you need to include both Windows and Messages!}
uses Windows,
Messages;
const AppName = 'Window1';
function WindowProc(Window: HWnd; AMessage, WParam,
LParam: Longint): Longint; stdcall; export;
begin
WindowProc := 0;
case AMessage of wm_Destroy:
begin
PostQuitMessage(0);
Exit;
end;
end;
WindowProc := DefWindowProc(Window, AMessage, WParam, LParam);
end;
{ Register the Window Class }
function WinRegister: Boolean;
var WindowClass: TWndClass;
begin
WindowClass.Style := cs_hRedraw or cs_vRedraw;
WindowClass.lpfnWndProc := @WindowProc;
WindowClass.cbClsExtra := 0;
WindowClass.cbWndExtra := 0;
WindowClass.hInstance := HInstance;
WindowClass.hIcon := LoadIcon(0, idi_Application);
WindowClass.hCursor := LoadCursor(0, idc_Arrow);
WindowClass.hbrBackground := HBrush(Color_Window);
WindowClass.lpszMenuName := nil;
WindowClass.lpszClassName := AppName;
Result := RegisterClass(WindowClass) <> 0;
end;
{ Create the Window Class }
function WinCreate: HWnd;
var hWindow: HWnd;
begin
hWindow := CreateWindow(AppName, 'Object Pascal Window',
ws_OverlappedWindow, cw_UseDefault, cw_UseDefault,
cw_UseDefault, cw_UseDefault, 0, 0, HInstance, nil);
if hWindow <> 0 then
begin
ShowWindow(hWindow, CmdShow);
UpdateWindow(hWindow);
end;
Result := hWindow;
end;
var AMessage: TMsg;
hWindow: HWnd;
begin
if not WinRegister then
begin
MessageBox(0, 'Register failed', nil, mb_Ok);
Exit;
end;
hWindow := WinCreate;
if hWindow = 0 then
begin
MessageBox(0, 'WinCreate failed', nil, mb_Ok);
Exit;
end;
while GetMessage(AMessage, 0, 0, 0) do
begin
TranslateMessage(AMessage);
DispatchMessage(AMessage);
end;
Halt(AMessage.wParam);
end. |
