Re: How to set the charset for the font programmatically?

[User (Legacy)]

First of all, thanks, Frank, for the answer on setting 

the desired charset. Being quite new to COM, I would like 

to ask you (or others) if my solution is optimal. 

The original question was... 

>> 

>> I am using Cfx4032.dll (version 4.0.16.0) in the C++ 

>> (VC++ ver. 6.0) application (ATL, no MFC). 

>> 

>> I am filling the series legend [...] 

>> Later, I do allow displaying the legend [...] 

>> The problem is that the strings are in the Czech language and the 

>> implicit font uses "Western" charset. [...] 

>> How can I do the same programmatically? 

>> 

>> I tried to use PutFonts(), but it uses only combination of the 

>> family, weight, and size [...] 

>> 

>> I do use Windows NT 4.0 English version with Czech regional setting. 

[...] 

Frank answered... 

> 

> Instead of using the Fonts property, you need to set the font using an OLE 

> Font object (IFont). The IFont interface has a property called CharSet 

that 

> allows you to change the Character set. 

> 

> The LegendBoxObj object has a property called Font that receives an OLE 

Font 

> object. 

> 

> There are also properties in the Chart object of this type (Axis(i).Font, 

> TopFont, etc.). 

[...] 

So, instead of PutFonts(), I have tried: 

  try { 

    ... 

    CComQIPtr<IFont,&IID_IFont> 

        pFont(spChartFX->GetSerLegBoxObj()->GetFont()); 

    ATLASSERT(pFont != 0); 

    HRESULT hr = pFont->put_Charset(EASTEUROPE_CHARSET); 

    ATLASSERT(SUCCEEDED(hr)); 

    ... 

  } 

It seems to work, but is this O.K.? I do know the basic principles 

of COM (I hope , but I do not know well the related details, 

e.g. the ATL templates for COM. 

Could you confirm correctness of the following description 

of what I think is behind the scene. 

The GetFont() returns (IFontDisp *). The interface is derived from 

IUnknown, i.e. it supports QueryInterface(). The CComQIPtr<> uses 

the QueryInterface() and the IID_IFont to get the interface IFont 

(from whatever other interface, i.e. also from IFontDisp) and wrap 

the pointer into the smart-pointer object. Then I did use the 

put_Charset(). 

Is there any other more efficient, more understandable, or simply 

better way to do the same? 

Thanks for comments, 

Petr 

-- 

Petr Prikryl, Skil s.r.o., e-mail: prikrylp at skil dot cz 

  Please, don't reply via e-mail.