SHChangeDWORDAsIDList structure
[SHChangeDWORDAsIDList is available for use in the operating systems specified in the Requirements section. It may be altered or unavailable in subsequent versions.]
Applies to: desktop apps only
Stores two DWORD values in a form mimicking an ITEMIDLIST so that they can be used by SHChangeNotify.
Syntax
typedef struct _SHChangeDWORDAsIDList {
USHORT cb;
DWORD dwItem1;
DWORD dwItem2;
USHORT cbZero;
} SHChangeDWORDAsIDList, *LPSHChangeDWORDAsIDList;
Members
- cb
-
Type: USHORT
-
The size of the structure, in bytes.
- dwItem1
-
Type: DWORD
-
First DWORD value.
- dwItem2
-
Type: DWORD
-
Second DWORD value.
- cbZero
-
Type: USHORT
Remarks
This example demonstrates the use of SHChangeUpdateImageIDList and SHChangeDWORDAsIDList by SHChangeNotify to mimic the SHUpdateImage function.
void MyUpdateImage(LPCWSTR pszHashItem, int iIndex, UINT uFlags, int iImageIndex)
{
SHChangeUpdateImageIDList rgPidl;
SHChangeDWORDAsIDList rgDWord;
int cchLen;
USHORT *pcb;
// Validate parameters: iImageIndex must be a valid system image list value.
if (iImageIndex < 0)
{
return;
}
// Validate parameters: pszHashItem must not exceed MAX_PATH in length
cchLen = lstrlenW(pszHashItem);
if (cchLen >= MAX_PATH)
{
return;
}
// Load SHChangeUpdateImageIDList
rgPidl.dwProcessID = GetCurrentProcessId();
rgPidl.iIconIndex = iIndex;
rgPidl.iCurIndex = iImageIndex;
rgPidl.uFlags = uFlags;
lstrcpynW(rgPidl.szName, pszHashItem, MAX_PATH);
pcb = &rgPidl.szName[cchLen+1];
// Set the size of the first element
rgPidl.cb = (USHORT)((BYTE*)pcb - (BYTE*)rgPidl);
// Terminate the "ITEMIDLIST"
*pcb = 0;
// Load SHChangeDWORDAsIDList
rgDWord.cb = (USHORT)FIELD_OFFSET(SHChangeDWORDAsIDList, cbZero);
rgDWord.dwItem1 = iImageIndex;
rgDWord.dwItem2 = 0;
rgDWord.cbZero = 0;
// Parameters are now in the form that SHCNE_UPDATEIMAGE can accept
SHChangeNotify(SHCNE_UPDATEIMAGE, SHCNF_IDLIST, &rgDWord, &rgPidl);
}
Requirements
|
Minimum supported client | Windows XP |
|---|---|
|
Minimum supported server | Windows Server 2003 |
|
End of client support | Windows XP with SP2 |
|
End of server support | Windows Server 2003 |
|
Header |
|
See also
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Build date: 3/7/2012
