Back to General and Gameplay Programming

Adding Parameters to Windows' Callbacks

General and Gameplay Programming Programming

Started by Donuts February 01, 2003 05:35 AM

0 comments, last by Donuts 21 years, 2 months ago

Donuts

122

Author

February 01, 2003 05:35 AM

I need to know if I can add a parameter to an existing windows callback. I have to use the MidiCallback and I need the callback to be able to access members of the class calling it(I hope that makes sense). Anyway it would make life much easier if I could pass an Lparam through it like what is done in DialogBoxParam. If anyone knows what I talking about and can offer some help/suggestion, it would be greatly appreciated.

cnstrnd

118

February 01, 2003 05:42 AM

    MMRESULT midiStreamOpen(  LPHMIDISTRM lphStream,    LPUINT      puDeviceID,   DWORD       cMidi,        DWORD_PTR   dwCallback,   DWORD_PTR   dwInstance, // <- ... made for you  DWORD       fdwOpen      );

I used this one to access my waveOut class

[edited by - cnstrnd on February 1, 2003 6:47:33 AM]