1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ComObj, ActiveX, ShlObj;
type
// Form that acts as IDropTarget
TForm1 = class(TForm, IDropTarget)
procedure FormCreate(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
private
// Private declarations
function SaveAsStg(FileNameBase: String; dataObj: IDataObject; fmt: tagFORMATETC): Boolean;
function SaveAsStm(FileNameBase: String; dataObj: IDataObject; fmt: tagFORMATETC): Boolean;
function SaveAsMem(FileNameBase: String; dataObj: IDataObject; fmt: tagFORMATETC): Boolean;
protected
// Protected declarations
function DragEnter(const dataObj: IDataObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult; stdcall;
function DragOver(grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult; reintroduce; stdcall;
function DragLeave: HResult; stdcall;
function Drop(const dataObj: IDataObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult; stdcall;
public
// Public declarations
end;
// Acceptable format types
const
CF_Acceptable: Array [0..1] of String = ('RenPrivateMessages',
'Internet Message (rfc822/rfc1522)');
// Predefined clipboard formats
const
CF_PredfinedFormats: Array [1..15] of String = ('Text',
'Bitmap',
'MetaFile',
'SYLK',
'DIF',
'TIFF',
'OemText',
'DIB',
'Palette',
'Pen Data',
'RIFF',
'Wave',
'Unicode Text',
'Enhanced Metafile',
'HDrop');
var
Form1: TForm1;
implementation
{$R *.DFM}
function TForm1.DragEnter(const dataObj: IDataObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult;
var pEFETC: IEnumFORMATETC;
FmtETC: tagFORMATETC;
lpszFormat: Array [0..255] of Char;
szFormat: String;
dwAllow: Integer;
dwfetch: Integer;
bAllow: Boolean;
begin
// Clear the format string
szFormat:='';
// Determine if we want to support the drop of this type
bAllow:=False;
if (dataObj.EnumFormatEtc(DATADIR_GET, pEFETC) = S_OK) then
begin
// Start the fetch enumeration
while (pEFETC.Next(1, FmtETC, @dwfetch) = S_OK) do
begin
// Attempt to get the clipboard format name
if (FmtETC.cfFormat in [1..15]) then
szFormat:=CF_PredfinedFormats[FmtETC.cfFormat]
else if (GetClipboardFormatName(FmtETC.cfFormat, lpszFormat, SizeOf(lpszFormat)) > 0) then
szFormat:=lpszFormat
else
szFormat:=IntToStr(FmtETC.cfFormat);
// Compare formats
for dwAllow:=0 to High(CF_Acceptable) do
begin
if (CompareText(CF_Acceptable[dwAllow], szFormat) = 0) then
begin
bAllow:=True;
if bAllow then break;
end;
end;
if bAllow then break;
end;
// Release the enumerator
pEFETC:=nil;
end;
// Should we allow the enter?
result:=NOERROR;
if not(bAllow) then dwEffect:=DROPEFFECT_NONE;
end;
function TForm1.DragOver(grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult;
begin
// Allow the drag over
result:=NOERROR;
end;
function TForm1.DragLeave: HResult;
begin
// Allow the drag leave
result:=NOERROR;
end;
function TForm1.SaveAsStg(FileNameBase: String; dataObj: IDataObject; fmt: tagFORMATETC): Boolean;
var medium: TStgMedium;
pvStg: IStorage;
begin
// Set default result
result:=False;
// Set tymed
fmt.tymed:=TYMED_ISTORAGE;
// Get the data
if (dataObj.GetData(fmt, medium) = S_OK) then
begin
// Create storage file
if (StgCreateDocfile(PWideChar(WideString(FileNameBase+'.msg')),
STGM_CREATE or STGM_READWRITE or STGM_SHARE_EXCLUSIVE , 0, pvStg) = S_OK) then
begin
// Copy from the dropped storage
result:=(IStorage(medium.stg).CopyTo(0, nil, nil, pvStg) = S_OK);
// Release the storage interface
pvStg:=nil;
end;
// We are responsible for releasing the storage medium
IStorage(medium.stg):=nil;
end;
end;
function TForm1.SaveAsStm(FileNameBase: String; dataObj: IDataObject; fmt: tagFORMATETC): Boolean;
var msStream: TMemoryStream;
pvStm: IStream;
medium: TStgMedium;
stat: TStatStg;
dwSize: Integer;
begin
// Set default result
result:=False;
// Set tymed
fmt.tymed:=TYMED_ISTREAM;
// Get the data
if (dataObj.GetData(fmt, medium) = S_OK) then
begin
// Get the stream
pvStm:=IStream(medium.stm);
// Stat to get the size
if (pvStm.Stat(stat, STATFLAG_NONAME) = S_OK) then
begin
// Create memory stream for output
msStream:=TMemoryStream.Create;
msStream.Size:=stat.cbSize;
if (IStream(medium.stm).Read(msStream.Memory, stat.cbSize, @dwSize) = S_OK) then
begin
msStream.Size:=dwSize;
msStream.Position:=0;
msStream.SaveToFile(FileNameBase+'.eml');
result:=True;
end;
msStream.Free;
end;
// Release the stream interface
IStream(medium.stm):=nil;
end;
end;
function TForm1.SaveAsMem(FileNameBase: String; dataObj: IDataObject; fmt: tagFORMATETC): Boolean;
var msStream: TMemoryStream;
medium: TStgMedium;
stat: TStatStg;
lpMem: Pointer;
dwSize: Integer;
begin
// Set default result
result:=False;
// Set tymed
fmt.tymed:=TYMED_HGLOBAL;
// Get the data
if (dataObj.GetData(fmt, medium) = S_OK) then
begin
// Get the memory and lock it
lpMem:=GlobalLock(medium.hGlobal);
// Create memory stream for output
msStream:=TMemoryStream.Create;
msStream.Write(lpMem^, GlobalSize(medium.hGlobal));
msStream.SaveToFile(FileNameBase+'.eml');
result:=True;
msStream.Free;
// Unlock and free the memory
GlobalUnlock(medium.hGlobal);
GlobalFree(medium.hGlobal);
end;
end;
function TForm1.Drop(const dataObj: IDataObject; grfKeyState: Longint; pt: TPoint; var dwEffect: Longint): HResult;
var pEFETC: IEnumFORMATETC;
FmtETC: tagFORMATETC;
msStream: TMemoryStream;
cfEml: Integer;
cfFile: Integer;
pvStg: IStorage;
medium: TStgMedium;
bHandle: Boolean;
dwFetch: Integer;
i64Size: Int64;
i64Move: Int64;
begin
// Set result
result:=NOERROR;
// Enumerate until we get are able to save the contents
bHandle:=False;
cfFile:=RegisterClipboardFormat(CFSTR_FILECONTENTS);
cfEml:=RegisterClipboardFormat('Internet Message (rfc822/rfc1522)');
if (dataObj.EnumFormatEtc(DATADIR_GET, pEFETC) = S_OK) then
begin
// Start the fetch enumeration
while (pEFETC.Next(1, FmtETC, @dwfetch) = S_OK) do
begin
// Check file contents
if (FmtETC.cfFormat = cfFile) then
begin
// Try as storage first, then stream
if ((FmtETC.cfFormat and TYMED_ISTORAGE) = TYMED_ISTORAGE) then
begin
if SaveAsStg('Test', dataObj, FmtEtc) then break;
end;
if ((FmtETC.cfFormat and TYMED_ISTREAM) = TYMED_ISTREAM) then
begin
if SaveAsStm('Test', dataObj, FmtEtc) then break;
end;
end
// Check for eml
else if (FmtETC.cfFormat = cfEml) then
begin
if SaveAsMem('Test', dataObj, FmtEtc) then break;
end;
end;
end;
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
// Register the form as a drop target
RegisterDragDrop(Handle, Self);
end;
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
// Revoke the form as a drop target
RevokeDragDrop(Handle);
end;
initialization
// Initialize ole
OleInitialize(nil);
finalization
// Uninitialize ole
OleUninitialize;
end. |
Extraire le fax d'un mail
Répondre avec citation
Partager