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Hello,

I haven't done much to my application. But when I added

the OnOpenDocument() to it, the menu item "open file..." was dimmed. When I

deleted everything associated with OnOpenDocument(), the item was suddenly

enabled. So does anyone know what is going on?

Thanks

Jack


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"Jacky Luk" <jl@knight.com>¼¶¼g©ó¶l¥ó·s»D:%23uO9xQGEHHA.4112@TK2MSFTNGP03.phx.gbl...





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"Jacky Luk" <jl@knight.com>¼¶¼g©ó¶l¥ó·s»D:eCOQdSGEHHA.3224@TK2MSFTNGP04.phx.gbl...

I blocked out this statement, 'open file...' came back...

If I did not block this out, even the 'about' dialog was dimmed.

But 'Save' and 'close document' were there when I added #include

"cFile.h"....

Very strange!!!







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"Jacky Luk" wrote:



You failed to provide appropriate ON_UPDATE_COMMAND_UI

handler. When you provide command handler, you also have to

provide corresponding ON_UPDATE_COMMAND_UI handler.

Otherwise menu item will be disabled. You need to understand

how command and message routing is implemented in MFC. Read

at least these technical notes:



"TN006: Message Maps"

msdn2.microsoft.com/en-us/library/0812b0wa(VS.80).aspx">msdn2.microsoft.com/en-us/library/0812b0wa(VS.80).aspx



"TN021: Command and Message Routing"

msdn2.microsoft.com/en-us/library/xt2c310k(VS.80).aspx">msdn2.microsoft.com/en-us/library/xt2c310k(VS.80).aspx



"TN022: Standard Commands Implementation"

msdn2.microsoft.com/en-us/library/11861byt(VS.80).aspx">msdn2.microsoft.com/en-us/library/11861byt(VS.80).aspx



Also, look into MFC's reference for command routing

description:



"Message Handling and Mapping"

msdn2.microsoft.com/en-us/library/6d1asasd(VS.80).aspx">msdn2.microsoft.com/en-us/library/6d1asasd(VS.80).aspx



Just dedicate half an hour to it and read everything in this

section. Especially pay attention to sections: "How the

Framework Calls a Handler" and "How the Framework Searches

Message Maps".



HTH

Alex



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"Alex Blekhman" <xfkt@oohay.moc>

???????:ebYyCDHEHHA.4112@TK2MSFTNGP03.phx.gbl...

Thanks Alex.

Jack





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