c语言 桌面下雪程序,[Lazarus]使用Lazarus编写的桌面下雪小程序

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LineTo(hdlDC, x + 9, y + 2);

MoveToEx(hdlDC, x + 6, y + 12, nil);

LineTo(hdlDC, x + 9, y + 12);

MoveToEx(hdlDC, x + 2, y + 6, nil);

LineTo(hdlDC, x + 2, y + 9);

MoveToEx(hdlDC, x + 12, y + 6, nil);

LineTo(hdlDC, x + 12, y + 9);

end else begin

MoveToEx(hdlDC, x + 7, y + 2, nil);

LineTo(hdlDC, x + 7, y + 13);

MoveToEx(hdlDC, x + 2, y + 7, nil);

LineTo(hdlDC, x + 13, y + 7);

MoveToEx(hdlDC, x + 4, y + 4, nil);

LineTo(hdlDC, x + 11, y + 11);

MoveToEx(hdlDC, x + 4, y + 10, nil);

LineTo(hdlDC, x + 11, y + 3);

MoveToEx(hdlDC, x + 6, y + 3, nil);

LineTo(hdlDC, x + 9, y + 3);

MoveToEx(hdlDC, x + 6, y + 11, nil);

LineTo(hdlDC, x + 9, y + 11);

MoveToEx(hdlDC, x + 3, y + 6, nil);

LineTo(hdlDC, x + 3, y + 9);

MoveToEx(hdlDC, x + 11, y + 6, nil);

LineTo(hdlDC, x + 11, y + 9);

end;

end;

procedure TfmMainForm.FormCreate(Sender: TObject);

var

i, nTimer:integer;

h:longint;

rcWorkArea:RECT;

hProgMan, hShellDefView:HWND;

begin

Application.ShowMainForm := false;

{

h := GetWindowLong(fmMainForm.Handle, GWL_EXSTYLE);

h := h or WS_EX_LAYERED;

SetWindowLong(fmMainForm.Handle, GWL_EXSTYLE, h);

SetLayeredWindowAttributes(fmMainForm.Handle, 0, 0, LWA_ALPHA);

}

randomize;

SystemParametersInfo(SPI_GETWORKAREA, 0, @rcWorkArea, 0);

hProgMan := FindWindow(‘ProgMan’, nil);

if(hProgMan <> 0) then begin

hShellDefView := FindWindowEx(hProgMan, 0, ‘SHELLDLL_DefView’, nil);

if(hShellDefView <> 0) then

hDesktop := FindWindowEx(hShellDefView, 0, ‘SysListView32’, nil);

end;

ScrWidth := abs(rcWorkArea.Right – rcWorkArea.Left);

ScrHeight := abs(rcWorkArea.Bottom – rcWorkArea.Top);

for i := 1 to SNOWNUM do begin

pData[i].x := random(ScrWidth);

pData[i].y := 0;

pData[i].size := (random(10) > 5);

pData[i].increment := (random(10) > 5);

nTimer := 10 + random(70);

SetTimer(fmMainForm.Handle, i, nTimer, @DrawFlake);

end;

hdlDC := GetDC(hDesktop);

hdlPen := CreatePen(PS_SOLID, 1, SNOWCOL);

SelectObject(hdlDC, hdlPen);

end;

procedure TfmMainForm.FormDestroy(Sender: TObject);

var

i:integer;

begin

for i := 1 to SNOWNUM do KillTimer(fmMainForm.Handle, i);

InvalidateRect(0, nil, true);

DeleteObject(hdlPen);

ReleaseDC(fmMainForm.Handle, hdlDC);

end;

procedure TfmMainForm.IDM_ExitClick(Sender: TObject);

begin

Application.Terminate;

end;

initialization

{$I main.lrs}

end.