example of embarcadero WindowHandleToPlatform c++

问题

I need an example of WindowHandleToPlatform for c++ builder I want to use the handle to do bitblt and other functions to a form I can do this using VCL and works great. Think WindowHandleToPlatform is the solution for firemonkey, but documentation is very poor

Thanks

回答1:

Try this:

#include <FMX.Platform.Win.hpp>

void __fastcall TMyForm::DoSomething()
{
    TWinWindowHandle *ThisHandle = WindowHandleToPlatform(this->Handle);
    if (ThisHandle != NULL)
    {
        HWND hWnd = ThisHandle->Wnd;
        if (ThisWnd != NULL)
        {
            // use ThisWnd as needed...
        }
    }
}

Or use FormToHWND() instead (which uses WindowHandleToPlatform() internally):

#include <FMX.Platform.Win.hpp>

void __fastcall TMyForm::DoSomething()
{
    HWND ThisWnd = FormToHWND(this);
    if (ThisWnd != NULL)
    {
        // use ThisWnd as needed...
    }
}

Either way, keep in mind that these functions are specific Windows. If you want something that is cross-platform, you will have to find another solution.

来源：https://stackoverflow.com/questions/20113627/example-of-embarcadero-windowhandletoplatform-c