72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
// 8 february 2014
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package main
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import (
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"fmt"
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// "syscall"
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"unsafe"
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)
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var (
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hInstance _HANDLE
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nCmdShow int
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// TODO font
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)
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// TODO is this trick documented in MSDN?
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func getWinMainhInstance() (err error) {
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r1, _, err := kernel32.NewProc("GetModuleHandleW").Call(uintptr(_NULL))
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if r1 == 0 { // failure
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return err
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}
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hInstance = _HANDLE(r1)
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return nil
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}
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// TODO this is what MinGW-w64's crt (svn revision TODO) does; is it best? is any of this documented anywhere on MSDN?
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func getWinMainnCmdShow() {
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var info struct {
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cb uint32
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lpReserved *uint16
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lpDesktop *uint16
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lpTitle *uint16
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dwX uint32
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dwY uint32
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dwXSize uint32
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dwYSzie uint32
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dwXCountChars uint32
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dwYCountChars uint32
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dwFillAttribute uint32
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dwFlags uint32
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wShowWindow uint16
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cbReserved2 uint16
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lpReserved2 *byte
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hStdInput _HANDLE
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hStdOutput _HANDLE
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hStdError _HANDLE
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}
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const _STARTF_USESHOWWINDOW = 0x00000001
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// does not fail according to MSDN
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kernel32.NewProc("GetStartupInfoW").Call(uintptr(unsafe.Pointer(&info)))
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if info.dwFlags & _STARTF_USESHOWWINDOW != 0 {
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nCmdShow = int(info.wShowWindow)
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} else {
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nCmdShow = _SW_SHOWDEFAULT
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}
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}
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func doWindowsInit() (err error) {
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err = getWinMainhInstance()
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if err != nil {
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return fmt.Errorf("error getting WinMain hInstance: %v", err)
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}
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getWinMainnCmdShow()
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err = initWndClassInfo()
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if err != nil {
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return fmt.Errorf("error initializing standard window class auxiliary info: %v", err)
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}
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// TODO others
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return nil // all ready to go
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}
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