[Resolved] Character String -> Wide Character String conversion problems

Trying to use the StgCreateDocfile or StgOpenStorage functions, MSDN says the first parameter, pwcsName, should point to the path of the file containing the storage object. I use the following code to get the filename of an existing file:

Code:

---

OPENFILENAME ofn;
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);                        // OS specific - may need to change for different Windows versions
ofn.hwndOwner = hwnd;
ofn.lpstrFilter = "Word Documents (*.doc)\0*.doc\0All files (*.*)\0*.*\0";
ofn.lpstrFile = szFileName;
ofn.nMaxFile = MAX_PATH;
ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
ofn.lpstrDefExt = "doc";
if (GetOpenFileName(&ofn))
{
        // Do something with the file name
...

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Then, since I need it in Wide Character String format, I do the following:

Code:

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MessageBox(NULL, szFileName, "", MB_OK);  // Debugging purposes - supplies correct filename, e.g "C:\My Documents\test.doc"
CharsConverted = mbstowcs(wcsFileName, szFileName, NULL);

---

This I *assume* has converted correctly, since I can't figure out how to view the contents of it in Debug mode :(
So, I try to open this storage file:

Code:

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hresFile = StgOpenStorage(wcsFileName, NULL, grfDocFileFlags, NULL, 0, ppstgDocFile);

---

But this returns STG_E_INVALIDNAME in hresFile:

Quote:

---

STG_E_INVALIDNAME
Indicates bad name in the pwcsName parameter.

---

Any ideas what I'm doing wrong?

Thanks

Chris

[Edit: Okay, i got it now. Stupid stupid me:

Code:

---

CharsConverted = mbstowcs(wcsFileName, szFileName, NULL);

---

should be:

Code:

---

CharsConverted = mbstowcs(wcsFileName, szFileName, MAX_PATH);

---

I thought NULL would mean carry on until you get to the end, but it's just an alias for /0, so it converted no characters :mad:]