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|
unit bsd_api;
interface
uses
Windows,
Messages;
procedure InitApplication;
procedure ExecuteApplication;
procedure FinalizeApplication;
implementation
var
WndClass: TWndClass;
HAppInstance: integer;
Msg: TMsg;
MainForm, Button1, Edit1: HWND;
//
Bitmap: TBitmap;
procedure Button1Click;
var
EditText: array[0..255] of char;
begin
GetWindowText(Edit1, EditText, 256);
// Display message box
MessageBox(MainForm,
PChar('You typed: ' + EditText),
'Message',
MB_APPLMODAL OR MB_ICONINFORMATION OR MB_OK);
end;
procedure CreateControls;
var
hControlFont: HFONT;
lfControl: TLogFont;
begin
// Create all controls (Edit1, Button1)
// See the help file for a description of the style flags
Edit1 := CreateWindowEx(WS_EX_CLIENTEDGE, // Extended style
'EDIT', // EDIT creates an edit box
'Edit1', // Name of window - also the text that will be in it
WS_CHILD OR WS_VISIBLE OR ES_AUTOHSCROLL OR ES_NOHIDESEL, // style flags
8, 16, 160, 21, // Position and size
MainForm, // Parent window
0, // Menu - none because it's an edit box(!)
HAppInstance, // Application instance
nil); // No creation data
Button1 := CreateWindow('BUTTON', // BUTTON creates an button, obviously
'Show Message', // Name of window - also the text that will be in it
WS_CHILD OR WS_VISIBLE OR BS_PUSHBUTTON OR BS_TEXT, // style flags
8, 40, 96, 25, // Position and size
MainForm, // Parent window
0, // Menu - none because it's a button
HAppInstance, // Application instance
nil); // No creation data
// Set up the font
{ Calculate font height from point size - they are not the same thing!
The first parameter of MulDiv is the point size. }
// lfControl.lfHeight := -MulDiv(8, GetDeviceCaps(GetDC(0), LOGPIXELSY), 96);
lfControl.lfFaceName :='Tahoma';
lfControl.lfHeight :=13;
lfControl.lfWeight :=0;
lfControl.lfItalic :=0;
lfControl.lfUnderline :=0;
lfControl.lfPitchAndFamily :=0;
lfControl.lfStrikeOut :=0;
lfControl.lfOutPrecision :=0;
lfControl.lfEscapement :=0;
lfControl.lfOrientation :=0;
lfControl.lfCharSet :=0;
lfControl.lfWidth :=0;
lfControl.lfClipPrecision :=0;
lfControl.lfQuality :=0;
// Create the font
hControlFont := CreateFontIndirect(lfControl);
// Tell controls to set their fonts
SendMessage(Edit1, WM_SETFONT, hControlFont, 1);
SendMessage(Button1, WM_SETFONT, hControlFont, 1);
end;
function WindowProc(hwnd: HWND; uMsg: UINT; wParam: WPARAM; lParam: LPARAM):
LRESULT; stdcall;
begin
// This is the function Windows calls when a message is sent to the application
case uMsg of // Check which message was sent
WM_DESTROY: PostQuitMessage(0); // Otherwise app will continue to run
// ...
// Handle any other messages here
WM_ACTIVATE: SetFocus(Edit1);
WM_COMMAND:
begin
Result := 0; // Default return value for this message
if lParam = Button1 then
case wParam of
BN_CLICKED: Button1Click; // Button was clicked
else Result := DefWindowProc(hwnd, uMsg, wParam, lParam);
end; // case wNotifyCode of
end; // case: WM_COMMAND
// ...
// Use default message processing
else Result := DefWindowProc(hwnd, uMsg, wParam, lParam);
end;
end;
procedure InitApplication;
begin
HAppInstance := HInstance;
// Set up window class
with WndClass do begin
Style := 0;
lpfnWndProc := @WindowProc; // See function above
cbClsExtra := 0; // no extra class memory
cbWndExtra := 0; // no extra window memory
hInstance := HAppInstance; // application instance
hIcon := 0; // use default icon
hCursor := LoadCursor(0, IDC_ARROW); // use arrow cursor
hbrBackground := COLOR_WINDOW; // standard window colour
lpszMenuName := nil; // no menu resource
lpszClassName := 'TMainForm';
end; // with WndClass
Windows.RegisterClass(WndClass); // Don't use Delphi's version of RegisterClass
// Create the window
MainForm := CreateWindow('TMainForm',
'Delphi API Demo', // window caption
WS_OVERLAPPEDWINDOW, // standard window style
CW_USEDEFAULT, CW_USEDEFAULT, // default position
320, 200, // size
0, // no owner window
0, // no menu
hInstance, // application instance
nil);
CreateControls; // See above
end;
procedure ExecuteApplication;//(Const Form:HWND)
begin
ShowWindow(MainForm, SW_SHOWMAXIMIZED); // make window visible
// Set up message loop
while GetMessage(Msg, 0, 0, 0) <> BOOL(FALSE) do begin
TranslateMessage(Msg);
DispatchMessage(Msg);
end;
end;
procedure FinalizeApplication;
begin
// Clean up code...
// I'm not sure these are actually needed
DestroyWindow(Edit1);
DestroyWindow(Button1);
end;
initialization
InitApplication;
finalization
FinalizeApplication;
end. |
