uses
ShellAPI;
function MakeDrop(const FileNames: array of string): THandle;
// Creates a hDrop Object
// erzeugt ein hDrop Object
var
I, Size: Integer;
Data: PDragInfoA;
P: PChar;
begin
// Calculate memory size needed
// berechne notwendig Speichergröße
Size := SizeOf(TDragInfoA) + 1;
for I := 0 to High(FileNames) do
Inc(Size, Length(FileNames[I]) + 1);
// allocate the memory
// alloziere den speicher
Result := GlobalAlloc(GHND or GMEM_SHARE, Size);
if Result <> 0 then
begin
Data := GlobalLock(Result);
if Data <> nil then
try
// fill up with data
// fülle daten
Data.uSize := SizeOf(TDragInfoA);
P := PChar(@Data.grfKeyState) + 4;
Data.lpFileList := P;
// filenames at the at of the header (separated with #0)
// am ende des headers nun die filenamen getrennt mit #0
for I := 0 to High(FileNames) do
begin
Size := Length(FileNames[I]);
Move(Pointer(FileNames[I])^, P^, Size);
Inc(P, Size + 1);
end;
finally
GlobalUnlock(Result);
end
else
begin
GlobalFree(Result);
Result := 0;
end;
end;
end;
function MyEnum(Wnd: hWnd; Res: PInteger): Bool; stdcall;
// search for a edit control with classname 'TEditControl'
// suche ein child fenster mit klassennamen 'TEditControl'
var
N: string;
begin
SetLength(N, MAX_PATH);
SetLength(N, GetClassName(Wnd, Pointer(N), Length(N)));
Result := AnsiCompareText('TEditControl', N) <> 0;
if not Result then Res^ := Wnd;
end;
// Example: Open msdos.sys in Delphi's Editor window
// Beispiel: msdos.sys im Delphi Editor öffnen
procedure TForm1.Button1Click(Sender: TObject);
var
Wnd: HWnd;
Drop: hDrop;
begin
// search for Delphi's Editor
// suche Delphis Editor Fenster
EnumChildWindows(FindWindow('TEditWindow', nil), @MyEnum, Integer(@Wnd));
if IsWindow(Wnd) then
begin
// Delphi's Editor found. Open msdos.sys
// Delphis editor gefunden, also öffne msdos.sys
Drop := MakeDrop(['c:\msdos.sys']);
if Drop <> 0 then PostMessage(Wnd, wm_DropFiles, Drop, 0);
// Free the memory?
// Speicher wieder freigeben?
GlobalFree(Drop);
end;
end;