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GeneralRe: The mystery of the disappearing socks Pin
Sander Rossel29-Jun-20 11:34
professionalSander Rossel29-Jun-20 11:34 
GeneralRe: The mystery of the disappearing socks Pin
RickZeeland29-Jun-20 8:37
mveRickZeeland29-Jun-20 8:37 
GeneralRe: The mystery of the disappearing socks Pin
OriginalGriff29-Jun-20 9:43
mveOriginalGriff29-Jun-20 9:43 
GeneralRe: The mystery of the disappearing socks Pin
CodeWraith29-Jun-20 10:07
MemberCodeWraith29-Jun-20 10:07 
GeneralRe: The mystery of the disappearing socks Pin
charlieg30-Jun-20 17:28
Membercharlieg30-Jun-20 17:28 
GeneralRe: The mystery of the disappearing socks Pin
TheGreatAndPowerfulOz29-Jun-20 9:59
MemberTheGreatAndPowerfulOz29-Jun-20 9:59 
GeneralRe: The mystery of the disappearing socks Pin
dandy7229-Jun-20 10:36
Memberdandy7229-Jun-20 10:36 
GeneralThe most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
honey the codewitch29-Jun-20 5:57
mvahoney the codewitch29-Jun-20 5:57 
So in terms of prep, communication with drivers is always fun. The MIDI API under windows gives you close to the metal access to the underlying driver, but dealing with it is tricky

Basically the trick of it is you have these MIDIEVENT structs in C and they can be *variable length*!!!

The variable part comes at the end of the core struct and must be multiples of 4 bytes long. You must pack these MIDIEVENT structs end to end in a single vector in memory before sending it to midiStreamOut

The .NET P/Invoke marshaller thing simply cannot deal with variable length structs meaning you wind up using Marshal.StructureToPtr(), Marshal.Copy() and/or Marshal.WriteByte(), etc yourself to construct your data.
Real programmers use butterflies

GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Richard MacCutchan29-Jun-20 6:24
mveRichard MacCutchan29-Jun-20 6:24 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Sander Rossel29-Jun-20 8:25
professionalSander Rossel29-Jun-20 8:25 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Richard MacCutchan29-Jun-20 9:23
mveRichard MacCutchan29-Jun-20 9:23 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
David O'Neil29-Jun-20 10:06
professionalDavid O'Neil29-Jun-20 10:06 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Greg Utas29-Jun-20 14:08
professionalGreg Utas29-Jun-20 14:08 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
David O'Neil29-Jun-20 15:30
professionalDavid O'Neil29-Jun-20 15:30 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Greg Utas29-Jun-20 23:41
professionalGreg Utas29-Jun-20 23:41 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Member 798912230-Jun-20 1:34
MemberMember 798912230-Jun-20 1:34 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Greg Utas30-Jun-20 1:56
professionalGreg Utas30-Jun-20 1:56 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Member 798912230-Jun-20 3:02
MemberMember 798912230-Jun-20 3:02 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
David O'Neil30-Jun-20 3:28
professionalDavid O'Neil30-Jun-20 3:28 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
David O'Neil30-Jun-20 4:27
professionalDavid O'Neil30-Jun-20 4:27 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Greg Utas30-Jun-20 7:23
professionalGreg Utas30-Jun-20 7:23 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
David O'Neil30-Jun-20 7:55
professionalDavid O'Neil30-Jun-20 7:55 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Greg Utas30-Jun-20 8:15
professionalGreg Utas30-Jun-20 8:15 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
David O'Neil30-Jun-20 9:06
professionalDavid O'Neil30-Jun-20 9:06 
GeneralRe: The most complicated P/Invoke call I've ever had to make from C# and it's a doozy Pin
Member 798912230-Jun-20 10:18
MemberMember 798912230-Jun-20 10:18 

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