// Delphi 下調用Windows API 創建窗體.//
program delphi;
uses
windows,
messages;
const
hellostr='Hello World!';
{$R delphi.res}
//窗口消息處理函數.
function MyWinProc(hWnd:THandle;uMsg:UINT;wParam,lParam:Cardinal):Cardinal;exp
ort;stdcall;
var
hdca,hdcb:THandle; //設備描述表句柄.
rect:TRect; //矩形結構.
font:HFont;
ps:TPaintStruct; //繪圖結構.
begin
result:=0;
case uMsg of
WM_PAINT:
begin
hdca:=BeginPaint(hWnd,ps);
SetBkMode(hdca, Transparent);
SetBkColor(hdca,GetBkColor(hdca));
GetClientRect(hWnd,rect); //獲取窗口客戶區的尺寸.
DrawText(hdca,Pchar(hellostr),-1,rect,DT_SINGLELINE or DT_CENTER or DT
_VCENTER);
// TextOut(hdc,100,40,hellostr,Length(hellostr));
EndPaint(hWnd,ps);
end;
WM_CREATE:
begin
hdcb := GetDC(hWnd);
font := CreateFont(45, 0, 0, 0, FW_normal, 0, 0, 0, ansi_charset, out
_default_precis, clip_default_precis,
default_quality, 34, PChar('Arial'));
SelectObject(hdcb, font);
ReleaseDC(hWnd, hdcb);
end;
WM_DESTROY:
PostQuitMessage(0)
else
//使用缺省的窗口消息處理函數.
result:=DefWindowProc(hWnd,uMsg,wParam,lParam);
end;
end;
//主程序開始.
var
Msg :TMsg; //消息結構.
hWnd,hInst :THandle; //Windows 窗口句柄.
WinClass :TWndClassEx; //Windows 窗口類結構.
begin
hInst:=GetModuleHandle(nil); // get the application instance
WinClass.cbSize:=SizeOf(TWndClassEx);
WinClass.lpszClassName:='MyWindow'; //類名.
WinClass.style:=CS_HREDRAW or CS_VREDRAW or CS_OWNDC;
WinClass.hInstance:=hInst; //程序的實例句柄.
//設置窗口消息處理函數.
WinClass.lpfnWndProc:=@MyWinProc; //窗口過程.
WinClass.cbClsExtra:=0; //以下兩個域用於在類結構和Window
s內部保存的窗口結構
WinClass.cbWndExtra:=0; //中預留一些額外空間.
WinClass.hIcon:=LoadIcon(hInstance,MakeIntResource('MAINICON'));
WinClass.hIconsm:=LoadIcon(hInstance,MakeIntResource('MAINICON'));
WinClass.hCursor:=LoadCursor(0,IDC_Arrow);
//GetStockObject 獲取一個圖形對象,在這裡是獲取繪制窗口背景的刷子,返回一個白色刷
子的句柄.
WinClass.hbrBackground:=HBRUSH(GetStockObject(white_Brush));
WinClass.lpszMenuName:=nil; //指定窗口類菜單.
//向Windows 注冊窗口類.
if RegisterClassEx(WinClass)=0 then
begin
MessageBox(0,'Registeration Error!','SDK/API',MB_OK);
Exit;
end;
//建立窗口對象.
hWnd:=CreateWindowEx(
WS_EX_OVERLAPPEDWINDOW, //擴展的窗口風格.
WinClass.lpszClassName, //類名.
'Hello Window', //窗口標題.
WS_OVERLAPPEDWINDOW, //窗口風格.
CW_USEDEFAULT, //窗口左上角相對於屏幕
左上角的初始位置x.
0, //....右y.
CW_USEDEFAULT, //窗口寬度x.
0, //窗口高度y.
0, //父窗口句柄.
0, //窗口菜單句柄.
hInst, //程序實例句柄.
nil); //創建參數指針.
if hWnd<>0 then
begin
ShowWindow(hWnd,SW_SHOWNORMAL); //顯示窗口.
UpdateWindow(hWnd); //指示窗口刷新自己.
SetWindowPos(hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE + SWP_NOSIZE);
end
else
MessageBox(0,'Window not Created!','SDK/API',MB_OK);
//主消息循環程序.
while GetMessage(Msg,0,0,0) do
begin
TranslateMessage(Msg); //轉換某些鍵盤消息.
DispatchMessage(Msg); //將消息發送給窗口過程.
end;
end.
其實Windows 編程是每個學寫程序的人都要掌握的,學Delphi時也最好能先學習Windos編程(最少要知道).以上代碼雖說不如在Delphi中直接來個New->Form來的快,但它能告訴你本質的東西.能讓你更好的了解消息循環以及其他.而這些正是讓New出來的窗體給掩蓋的部分 .
>注:以上代碼是我從Windows 程序設計上通過C++語法直譯過來的(),測試後沒有問題.若我的注解有什麼錯誤的地方,請各位指正!^_^
