Board index » cppbuilder » Why SetEnhMetaFileBits always fail?

2004-10-27 06:52:08 PM
cppbuilder114
Hi,
In a project, I want to insert a picture into the F1book.
Here is my code:
1 TMemoryStream* wmfStream = new TMemoryStream();
2 wmfStream->LoadFromFile("c:\\tmpwmf.wmf");
3 int size = wmfStream->Size;
4 wmfStream->Position = 0;
5 char* buffer = new char[size];
6 wmfStream->Read((void*)buffer, size);
7 HENHMETAFILE hMf = ::SetEnhMetaFileBits(size, buffer);
8 F1Book1->ObjCreatePicture(col, row, col, row, (unsigned int)hMf, 7,
width, height);
The result of SetEnhMetaFileBits is always NULL. But the wmf file is not
corrupt.
And what is the type of HENHMETAFILE?
BCB tells me that it's "void*"! I think it's not reasonable.
Thanks in advance.
bucher
 

"bucher" < XXXX@XXXXX.COM >wrote in message
been obtained by calling GetEnhMetaFileBits(). You are currently not doing
that. Use GetEnhMetaFile() before you can call GetEnhMetaFileBits().
Better yet, don't load the meta data manually at all. Use the VCL's
TMetafile class instead. It does all of the work for you, ie:
TMetafile *mf = new TMetafile;
try
{
mf->LoadFromFile("c:\\tmpwmf.wmf");
F1Book1->ObjCreatePicture(col, row, col, row, mf->Handle, 7, width,
height);
}
__finally {
delete mf;
}
Gambit