DragDrop to a native window?
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does anyone know how to implement drag drop events in native windows? there doesn't seem to be any WM_DRAGDROP message! related question, are the dotnet drag drop events into a control implemented by some object or code library that is accessible? TIA! ________________________________________ Gosh, it would be awful pleas'n, to reason out the reason, for things I can't explain. Then perhaps I'd deserve ya, and be even worthy of ya.. if I only had a brain!
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does anyone know how to implement drag drop events in native windows? there doesn't seem to be any WM_DRAGDROP message! related question, are the dotnet drag drop events into a control implemented by some object or code library that is accessible? TIA! ________________________________________ Gosh, it would be awful pleas'n, to reason out the reason, for things I can't explain. Then perhaps I'd deserve ya, and be even worthy of ya.. if I only had a brain!
Drag and drop is not trivial to implement. .NET exposes this in a rather easy-to-use method that encapsulates all the native functions, interfaces, structs, and enums/constants. As you can see, though, not every control in .NET supports drag and drop, either. There is a lot that has to be done in order to do this for native windows. There is more documentation in the Platform SDK at http://msdn.microsoft.com/library/en-us/dnanchor/html/anch_WinShell.asp[^]. Specific interfaces and functions to look at are
IDropSource,IDropTarget,IDataOject, andDoDragDrop. These are all from the Platform SDK, not the .NET Framework SDK (I only mentioned because a couple of these have similarly named equivalents in both). Those four interfaces and functions - along with the documentation about them - should be enough to get you started. On a side note, so long as the clipboard formats are supported by both the drag source and the drop target - regardless whether either one is managed or native - and the data is formatted correctly you can drag and drop between windows. Finally, if you are looking to add drag-n-drop support to your native Windows, first read about the Windows Shell and drag-n-drop interfaces from the link I gave you and continue in the Visual C++ or ATL/WTL/STL forum.-----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----
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Drag and drop is not trivial to implement. .NET exposes this in a rather easy-to-use method that encapsulates all the native functions, interfaces, structs, and enums/constants. As you can see, though, not every control in .NET supports drag and drop, either. There is a lot that has to be done in order to do this for native windows. There is more documentation in the Platform SDK at http://msdn.microsoft.com/library/en-us/dnanchor/html/anch_WinShell.asp[^]. Specific interfaces and functions to look at are
IDropSource,IDropTarget,IDataOject, andDoDragDrop. These are all from the Platform SDK, not the .NET Framework SDK (I only mentioned because a couple of these have similarly named equivalents in both). Those four interfaces and functions - along with the documentation about them - should be enough to get you started. On a side note, so long as the clipboard formats are supported by both the drag source and the drop target - regardless whether either one is managed or native - and the data is formatted correctly you can drag and drop between windows. Finally, if you are looking to add drag-n-drop support to your native Windows, first read about the Windows Shell and drag-n-drop interfaces from the link I gave you and continue in the Visual C++ or ATL/WTL/STL forum.-----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----
:-D Heath, thank you for the great references (as usual!). ________________________________________ Gosh, it would be awful pleas'n, to reason out the reason, for things I can't explain. Then perhaps I'd deserve ya, and be even worthy of ya.. if I only had a brain!