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Windows
(Programming)
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Title
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Description
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Release
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There is a special page dedicated to this utility, published on
the C/C++ Users Journal. Follow the link
to learn more about this tool.
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1 August 2000 |
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HW Port IO in Win95/98
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It is not true that you need a VXD to read/write from hardware
port in Windows95/98. Here you
can find the required code (tested with Borland C++) that I have
found some years ago in a newsgroup.
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27 June 2000
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How to Determine Cursor Shape
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I think I have found a way to determine the shape of the mouse
cursor, even if it is owned by another application. I’ve
read this question in a Borland newsgroup, but nobody seemed to
have an answer. Please send me some comments and tell me if this
is the best and a working solution.
Basically, I’ve divided the problem into two steps: the first one
is to retrieve the handle of the cursor (and for this there is a
MSDN document), while the second one is to determine its shape.
For this second step, I’ve noticed that whenever I call LoadCursor
(0, IDC_WAIT), I get always the same value. So it is for LoadCursor(0,
IDC_ARROW), for which I always get the same value that is obviously
different with respect to the IDC_WAIT one. If this
is always true (and this is not documented anywhere) it is possible
to determine if a HCURSOR hCur is a IDC_XXX cursor
simply using my very complex function:
IsCurrentCursorIDC(IDC_XXX);
You can get the full code here.
Of course, depending on how many times you have to call this routine,
you can imagine to use a more conservative approach such as loading
all the cursors only once and store them in static variables, and
make the test on all the Cursors flavors that you want.
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16 June 2000
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How to extract Version
Info from running process
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This simple code explains how to extract version info from the
running process.
Look for VS_FIXEDFILEINFO in your help file to see how much
info you have extracted.
char sss[256];
DWORD dwDummy;
unsigned int uiSize;
GetModuleFileName(NULL, sss, sizeof(sss));
DWORD dwSize = GetFileVersionInfoSize(sss, &dwDummy);
char *lpData = new char[dwSize];
GetFileVersionInfo(sss, 0, dwSize, lpData);
VS_FIXEDFILEINFO *lpffi;
VerQueryValue(lpData, "\\", (LPVOID *)&lpffi, &uiSize);
delete [] lpData;
wsprintf(sss, "%d.%d.%d.%d", HIWORD(lpffi->dwFileVersionMS),
LOWORD(lpffi->dwFileVersionMS), HIWORD(lpffi->dwFileVersionLS),
LOWORD(lpffi->dwFileVersionLS));
MessageBox(NULL, sss, "VersionInfo", MB_OK); |
14 June 2000
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GIF, PNG, JPEG, WMF,
EMF and BMP lightweight Image Control
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ListView controls have the capability to display JPEG, PNG,
GIF, BMP, WMF and EMF images.
To use them as simple image controls, it is sufficient to send them
a message as in the following example (where hCtlListView1 is
the handle of the ListView control and where szFileName is
the FULL path of the image file to be displayed).
LVBKIMAGE lv;
ZeroMemory(&lv, sizeof(lv));
lv.ulFlags = LVBKIF_STYLE_NORMAL | LVBKIF_SOURCE_URL;
lv.pszImage = szFileName; //full path required
lv.cchImageMax = lstrlen(szFileName);//unnecessary?
ListView_SetBkImage(hCtlListView1, &lv);
This requires comctl32.dll 4.71 and above. Note that animated GIF
are displayed as normal GIF, and only the first frame is displayed.
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13 June 2000,
updated 22 June 2000
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NetEnum
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This simple utility retrieves some network info and stores it in
a list of strings for further processing.
The function prototype is
bool EnumNet(StrList& list, DWORD dwLevel, LPNETRESOURCE
lpNet);
where StrList is a typedef for list<string>.
The usage is simple: imagine that you want to use if with a OWL::TListBox
object. If lb is a pointer to the object, all you have to
do is:
StrList sl;
if (EnumNet(sl, 0, NULL))
for (sl_It i = sl.begin(); i != sl.end(); i++)
lb->AddString((*i).c_str());
In the case of plain SDK API programming, the code will become,
assuming that hWndLB is the HWND handle of the listbox:
StrList sl;
if (EnumNet(sl, 0, NULL))
for (sl_It i = sl.begin(); i != sl.end(); i++)
SendMessage(hWndLB, LB_ADDSTRING, 0, (LPARAM)(LPCTSTR)(*i).c_str());
In both cases, you’ll obtain a thing like this:
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1.0 – 09 June 2000
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©
Copyright (2000), Luigi Bianchi
Last Update:
June 25, 2002
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