Title: Creating an alone window with API
Question: How to build a form without just using calls API.
Answer:
Creating an alone window with API
//Turn off every project that this inside of the (*.DRP) and copy the code that this below !
program Project1;
uses
windows,
messages;
procedure MainPaint(hWindow:HWND; pt:TPaintStruct);
begin
SetBkMode(pt.hdc,TRANSPARENT);
TextOut(pt.hdc,1,1,'Janela feita s com EIPIAI do Windows!',38 );
end;
procedure MainDestroy(hWindow: HWND);
begin
PostQuitMessage(0);
end;
// Main Window Procedure
function MainWndProc(hWindow: HWND; Msg: UINT; WParam: WPARAM;
LParam: LPARAM): LRESULT; stdcall; export;
var
ps: TPaintStruct;
begin
Result := 0;
case Msg of
WM_PAINT: begin
BeginPaint(hWindow, ps);
MainPaint(hWindow,ps);
EndPaint( hWindow, ps );
end;
WM_DESTROY: MainDestroy(hWindow);
else begin
result := DefWindowProc( hWindow, Msg, wParam, lParam );
exit;
end;
end; // case
end;
// Main Procedure
var
wc: TWndClass;
hWindow: HWND;
Msg: TMsg;
begin
wc.lpszClassName := 'GenericAppClass';
wc.lpfnWndProc := @MainWndProc;
wc.style := CS_VREDRAW or CS_HREDRAW;
wc.hInstance := hInstance;
wc.hIcon := LoadIcon(0,IDI_APPLICATION);
wc.hCursor := LoadCursor(0,IDC_ARROW);
wc.hbrBackground := (COLOR_WINDOW+1);
wc.lpszMenuName := nil;
wc.cbClsExtra := 0;
wc.cbWndExtra := 0;
RegisterClass(wc);
hWindow := CreateWindowEx(WS_EX_CONTROLPARENT or WS_EX_WINDOWEDGE,
'GenericAppClass',
'API',
WS_VISIBLE or WS_CLIPSIBLINGS or
WS_CLIPCHILDREN or WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,0,
400,300,
0,
0,
hInstance,
nil);
ShowWindow(hWindow,CmdShow);
UpDateWindow(hWindow);
// Message Loop
while GetMessage(Msg, 0, 0, 0) do
begin
TranslateMessage(Msg);
DispatchMessage(Msg);
end;
Halt(Msg.wParam);
end.
//after having compiled that project it should create an executable of 17KB approximately